_split.layout (gb.qt4)?
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Returns or sets the description of the splitter layout.
This property is an integer array of the relative sizes of the children. If there are more children in the split than entries in the array, those children get a relative size of 0, i.e. they are hidden.
Use it if you want to save and restore the splitter layout.
Example
HSplit1.Layout = [40, 60]