Merge this guy with another SimAbstractMemory instance

def merge(self, others, merge_conditions, common_ancestor=None):
        """
        Merge this guy with another SimAbstractMemory instance
        """
        merging_occurred = False

        for o in others:
            for region_id, region in o._regions.items():
                if region_id in self._regions:
                    merging_occurred |= self._regions[region_id].merge(
                        [region], merge_conditions, common_ancestor=common_ancestor
                    )
                else:
                    merging_occurred = True
                    self._regions[region_id] = region

        return merging_occurred