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annotate org.eclipse.equinox.common/src/org/eclipse/core/runtime/IStatus.d @ 105:bbe49769ec18

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author Frank Benoit <benoit@tionex.de>
date Sun, 08 Nov 2009 12:42:30 +0100
parents bc29606a740c
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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2006 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 *******************************************************************************/
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11 // Port to the D programming language:
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12 // Frank Benoit <benoit@tionex.de>
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13 module org.eclipse.core.runtimeIStatus;
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15 import java.lang.all;
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16
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17 import org.eclipse.core.runtimeStatus; // packageimport
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18
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19 /**
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20 * A status object represents the outcome of an operation.
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21 * All <code>CoreException</code>s carry a status object to indicate
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22 * what went wrong. Status objects are also returned by methods needing
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23 * to provide details of failures (e.g., validation methods).
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24 * <p>
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25 * A status carries the following information:
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26 * <ul>
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27 * <li> plug-in identifier (required)</li>
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28 * <li> severity (required)</li>
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29 * <li> status code (required)</li>
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30 * <li> message (required) - localized to current locale</li>
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31 * <li> exception (optional) - for problems stemming from a failure at
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32 * a lower level</li>
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33 * </ul>
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34 * Some status objects, known as multi-statuses, have other status objects
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35 * as children.
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36 * </p>
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37 * <p>
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38 * The class <code>Status</code> is the standard public implementation
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39 * of status objects; the subclass <code>MultiStatus</code> is the
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40 * implements multi-status objects.
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41 * </p><p>
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42 * This interface can be used without OSGi running.
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43 * </p>
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44 * @see MultiStatus
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45 * @see Status
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46 */
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47 public interface IStatus {
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48
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49 /** Status severity constant (value 0) indicating this status represents the nominal case.
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50 * This constant is also used as the status code representing the nominal case.
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51 * @see #getSeverity()
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52 * @see #isOK()
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53 */
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54 public static final int OK = 0;
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56 /** Status type severity (bit mask, value 1) indicating this status is informational only.
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57 * @see #getSeverity()
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58 * @see #matches(int)
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59 */
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60 public static final int INFO = 0x01;
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61
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62 /** Status type severity (bit mask, value 2) indicating this status represents a warning.
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63 * @see #getSeverity()
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64 * @see #matches(int)
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65 */
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66 public static final int WARNING = 0x02;
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68 /** Status type severity (bit mask, value 4) indicating this status represents an error.
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69 * @see #getSeverity()
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70 * @see #matches(int)
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71 */
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72 public static final int ERROR = 0x04;
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74 /** Status type severity (bit mask, value 8) indicating this status represents a
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75 * cancelation
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76 * @see #getSeverity()
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77 * @see #matches(int)
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78 * @since 3.0
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79 */
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80 public static final int CANCEL = 0x08;
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81
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82 /**
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83 * Returns a list of status object immediately contained in this
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84 * multi-status, or an empty list if this is not a multi-status.
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85 *
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86 * @return an array of status objects
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87 * @see #isMultiStatus()
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88 */
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89 public IStatus[] getChildren();
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90
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91 /**
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92 * Returns the plug-in-specific status code describing the outcome.
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93 *
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94 * @return plug-in-specific status code
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95 */
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96 public int getCode();
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97
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98 /**
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99 * Returns the relevant low-level exception, or <code>null</code> if none.
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100 * For example, when an operation fails because of a network communications
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101 * failure, this might return the <code>java.io.IOException</code>
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102 * describing the exact nature of that failure.
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103 *
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104 * @return the relevant low-level exception, or <code>null</code> if none
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105 */
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106 public Throwable getException();
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107
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108 /**
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109 * Returns the message describing the outcome.
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110 * The message is localized to the current locale.
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111 *
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112 * @return a localized message
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113 */
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114 public String getMessage();
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115
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116 /**
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117 * Returns the unique identifier of the plug-in associated with this status
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118 * (this is the plug-in that defines the meaning of the status code).
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119 *
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120 * @return the unique identifier of the relevant plug-in
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121 */
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122 public String getPlugin();
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123
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124 /**
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125 * Returns the severity. The severities are as follows (in
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126 * descending order):
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127 * <ul>
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128 * <li><code>CANCEL</code> - cancelation occurred</li>
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129 * <li><code>ERROR</code> - a serious error (most severe)</li>
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130 * <li><code>WARNING</code> - a warning (less severe)</li>
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131 * <li><code>INFO</code> - an informational ("fyi") message (least severe)</li>
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132 * <li><code>OK</code> - everything is just fine</li>
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133 * </ul>
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134 * <p>
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135 * The severity of a multi-status is defined to be the maximum
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136 * severity of any of its children, or <code>OK</code> if it has
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137 * no children.
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138 * </p>
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139 *
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140 * @return the severity: one of <code>OK</code>, <code>ERROR</code>,
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141 * <code>INFO</code>, <code>WARNING</code>, or <code>CANCEL</code>
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142 * @see #matches(int)
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143 */
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144 public int getSeverity();
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145
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146 /**
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147 * Returns whether this status is a multi-status.
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148 * A multi-status describes the outcome of an operation
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149 * involving multiple operands.
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150 * <p>
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151 * The severity of a multi-status is derived from the severities
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152 * of its children; a multi-status with no children is
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153 * <code>OK</code> by definition.
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154 * A multi-status carries a plug-in identifier, a status code,
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155 * a message, and an optional exception. Clients may treat
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156 * multi-status objects in a multi-status unaware way.
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157 * </p>
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158 *
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159 * @return <code>true</code> for a multi-status,
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160 * <code>false</code> otherwise
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161 * @see #getChildren()
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162 */
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163 public bool isMultiStatus();
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164
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165 /**
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166 * Returns whether this status indicates everything is okay
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167 * (neither info, warning, nor error).
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168 *
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169 * @return <code>true</code> if this status has severity
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170 * <code>OK</code>, and <code>false</code> otherwise
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171 */
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172 public bool isOK();
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173
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174 /**
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175 * Returns whether the severity of this status matches the given
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176 * severity mask. Note that a status with severity <code>OK</code>
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177 * will never match; use <code>isOK</code> instead to detect
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178 * a status with a severity of <code>OK</code>.
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179 *
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180 * @param severityMask a mask formed by bitwise or'ing severity mask
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181 * constants (<code>ERROR</code>, <code>WARNING</code>,
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182 * <code>INFO</code>, <code>CANCEL</code>)
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183 * @return <code>true</code> if there is at least one match,
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184 * <code>false</code> if there are no matches
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185 * @see #getSeverity()
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186 * @see #CANCEL
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187 * @see #ERROR
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188 * @see #WARNING
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189 * @see #INFO
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190 */
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191 public bool matches(int severityMask);
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192 }