If the width of a divider has been increased through the use of this property, this event occurs when the user double-clicks the boundary between the divider and the adjacent column.
如果已通过使用此属性增加了分隔符的宽度，则当用户双击分隔符与相邻列之间的边界时，会发生此事件。
If the width of a divider has been increased through the use of this property, this event occurs when the user double-clicks the boundary between the divider and the adjacent column.
如果已通过使用此属性增加了分隔符的宽度，则当用户双击分隔符与相邻列之间的边界时，会发生此事件。
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