The layout with a copy of panel added at position. Beside another panel, the new panel joins
the target's row or column, or the target is wrapped in a new one; the items of that container
share it evenly as integer percentages. tab adds the panel to the target's stack and shows it;
end adds it at the right end of the root, and an empty layout gets a root stack.
LayoutEditError when the placement is not one of PANEL_PLACEMENTS or end, when a placement
other than end has no relativeTo, or when relativeTo is not in the layout.
The layout with a copy of
paneladded atposition. Beside another panel, the new panel joins the target's row or column, or the target is wrapped in a new one; the items of that container share it evenly as integer percentages.tabadds the panel to the target's stack and shows it;endadds it at the right end of the root, and an empty layout gets a root stack.