Widget.getChildRequisition

This function is only for use in widget implementations. Obtains widget->requisition, unless someone has forced a particular geometry on the widget (e.g. with [gtk.widget.Widget.setSizeRequest]), in which case it returns that geometry instead of the widget's requisition.

This function differs from [gtk.widget.Widget.sizeRequest] in that it retrieves the last size request value from widget->requisition, while [gtk.widget.Widget.sizeRequest] actually calls the "size_request" method on widget to compute the size request and fill in widget->requisition, and only then returns widget->requisition.

Because this function does not call the “size_request” method, it can only be used when you know that widget->requisition is up-to-date, that is, [gtk.widget.Widget.sizeRequest] has been called since the last time a resize was queued. In general, only container implementations have this information; applications should use [gtk.widget.Widget.sizeRequest].