stubs: create dummy data objects when safe; better handling of builtins
stubs: create dummy data objects when safe; better handling of builtins

david-lassonde-adsk/pymel,AtonLerin/pymel,assumptionsoup/pymel,leonsooi/pymel,shrtcww/pymel,juggernate/pymel,AtonLerin/pymel,juggernate/pymel,leonsooi/pymel,david-lassonde-adsk/pymel,shrtcww/pymel,assumptionsoup/pymel