Detailed Description

ArchSelectionObserver([origin,watched,hide,nextCommand]): The ArchSelectionObserver
object can be added as a selection observer to the FreeCAD Gui. If watched is given (a
document object), the observer will be triggered only when that object is selected/unselected.
If hide is True, the watched object will be hidden. If origin is given (a document
object), that object will have its visibility/selectability restored. If nextCommand
is given (a FreeCAD command), it will be executed on leave.