def hasSegmentsKey(self, key): 
        return key in self._mapKeysToLabels.keys()
whether a group of segments is already stored under name 'key' on disk
dataset/ETHPy150Open ilastik/ilastik-0.5/ilastik/modules/interactive_segmentation/core/interactiveSegmentationModuleMgr.py/InteractiveSegmentationItemModuleMgr.hasSegmentsKey