-Removes a child from the sizer and destroys it. \arg{sizer} is the wxSizer to be removed,
-\arg{index} is the position of the child in the sizer, typically 0 for the first item.
+Removes a child from the sizer and destroys it if it is a sizer or a spacer,
+but not if it is a window (because windows are owned by their parent window,
+not the sizer). \arg{sizer} is the wxSizer to be removed,
+\arg{index} is the position of the child in the sizer, e.g. $0$ for the first item.