restoreDeclaredPlacement

Puts component back under the layout constraint its modifier declares, after something outside the composition put it somewhere else - the look and feel docking a tool bar back under NORTH, say.

Does nothing when component stands in another parent, or its modifier declares no constraint. It sits on this scope because the end of the pass is the first point where the component is placed and the node is in hand. Core keeps no other public way from a component to its declaration.