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annotate org.eclipse.swt.win32.win32.x86/src/org/eclipse/swt/widgets/Item.d @ 0:6dd524f61e62

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add dwt win and basic java stuff
author Frank Benoit <benoit@tionex.de>
date Mon, 02 Mar 2009 14:44:16 +0100
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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2008 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 * Port to the D programming language:
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11 * Frank Benoit <benoit@tionex.de>
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12 *******************************************************************************/
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13 module org.eclipse.swt.widgets.Item;
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14
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15
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16 import org.eclipse.swt.widgets.Widget;
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17 import org.eclipse.swt.SWT;
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18 import org.eclipse.swt.graphics.Image;
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19 import java.lang.all;
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20
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21 /**
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22 * This class is the abstract superclass of all non-windowed
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23 * user interface objects that occur within specific controls.
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24 * For example, a tree will contain tree items.
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25 * <dl>
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26 * <dt><b>Styles:</b></dt>
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27 * <dd>(none)</dd>
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28 * <dt><b>Events:</b></dt>
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29 * <dd>(none)</dd>
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30 * </dl>
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31 *
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32 * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
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33 */
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34
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35 public abstract class Item : Widget {
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36 String text;
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37 Image image;
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38
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39 /**
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40 * Constructs a new instance of this class given its parent
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41 * and a style value describing its behavior and appearance.
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42 * The item is added to the end of the items maintained by its parent.
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43 * <p>
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44 * The style value is either one of the style constants defined in
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45 * class <code>SWT</code> which is applicable to instances of this
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46 * class, or must be built by <em>bitwise OR</em>'ing together
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47 * (that is, using the <code>int</code> "|" operator) two or more
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48 * of those <code>SWT</code> style constants. The class description
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49 * lists the style constants that are applicable to the class.
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50 * Style bits are also inherited from superclasses.
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51 * </p>
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52 *
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53 * @param parent a widget which will be the parent of the new instance (cannot be null)
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54 * @param style the style of item to construct
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55 *
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56 * @exception IllegalArgumentException <ul>
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57 * <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
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58 * </ul>
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59 * @exception SWTException <ul>
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60 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
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61 * </ul>
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62 *
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63 * @see SWT
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64 * @see Widget#getStyle
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65 */
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66 public this (Widget parent, int style) {
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67 super (parent, style);
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68 text = "";
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69 }
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70
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71 /**
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72 * Constructs a new instance of this class given its parent
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73 * and a style value describing its behavior and appearance,
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74 * and the index at which to place it in the items maintained
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75 * by its parent.
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76 * <p>
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77 * The style value is either one of the style constants defined in
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78 * class <code>SWT</code> which is applicable to instances of this
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79 * class, or must be built by <em>bitwise OR</em>'ing together
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80 * (that is, using the <code>int</code> "|" operator) two or more
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81 * of those <code>SWT</code> style constants. The class description
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82 * lists the style constants that are applicable to the class.
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83 * Style bits are also inherited from superclasses.
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84 * </p>
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85 *
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86 * @param parent a widget which will be the parent of the new instance (cannot be null)
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87 * @param style the style of item to construct
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88 * @param index the zero-relative index at which to store the receiver in its parent
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89 *
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90 * @exception IllegalArgumentException <ul>
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91 * <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
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92 * <li>ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the parent (inclusive)</li>
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93 * </ul>
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94 * @exception SWTException <ul>
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95 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
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96 * </ul>
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97 *
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98 * @see SWT
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99 * @see Widget#getStyle
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100 */
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101 public this (Widget parent, int style, int index) {
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102 this (parent, style);
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103 }
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104
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105 override protected void checkSubclass () {
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106 /* Do Nothing - Subclassing is allowed */
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107 }
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108
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109 /**
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110 * Returns the receiver's image if it has one, or null
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111 * if it does not.
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112 *
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113 * @return the receiver's image
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114 *
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115 * @exception SWTException <ul>
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116 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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117 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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118 * </ul>
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119 */
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120 public Image getImage () {
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121 checkWidget ();
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122 return image;
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123 }
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124
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125 override String getNameText () {
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126 return getText ();
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127 }
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128
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129 /**
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130 * Returns the receiver's text, which will be an empty
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131 * string if it has never been set.
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132 *
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133 * @return the receiver's text
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134 *
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135 * @exception SWTException <ul>
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136 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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137 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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138 * </ul>
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139 */
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140 public String getText () {
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141 checkWidget();
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142 return text;
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143 }
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144
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145 override void releaseWidget () {
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146 super.releaseWidget ();
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147 text = null;
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148 image = null;
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149 }
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150
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151 /**
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152 * Sets the receiver's image to the argument, which may be
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153 * null indicating that no image should be displayed.
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154 *
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155 * @param image the image to display on the receiver (may be null)
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156 *
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157 * @exception IllegalArgumentException <ul>
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158 * <li>ERROR_INVALID_ARGUMENT - if the image has been disposed</li>
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159 * </ul>
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160 * @exception SWTException <ul>
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161 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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162 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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163 * </ul>
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164 */
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165 public void setImage (Image image) {
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166 checkWidget ();
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167 if (image !is null && image.isDisposed()) error(SWT.ERROR_INVALID_ARGUMENT);
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168 this.image = image;
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169 }
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170
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171 /**
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172 * Sets the receiver's text.
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173 *
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174 * @param string the new text
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175 *
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176 * @exception SWTException <ul>
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177 * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
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178 * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
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179 * </ul>
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180 */
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181 public void setText (String string) {
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182 checkWidget ();
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183 // SWT extension: allow null string
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184 //if (string is null) error (SWT.ERROR_NULL_ARGUMENT);
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185 text = string;
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186 }
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187
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188 }