def _invalidate(self):
        CanvasCache.invalidate(self)
proxy(object[, callback]) -- create a proxy object that weakly
dataset/ETHPy150Open AnyMesh/anyMesh-Python/example/urwid/widget.py/Widget._invalidate--crossover with--dataset/ETHPy150Open CountZer0/PipelineConstructionSet/python/maya/site-packages/pymel-1.0.5/extras/completion/py/maya/OpenMayaRender.py/weakref_proxy