def remove(self, ann):
        try:
            return self._elements.remove(ann)
        except ValueError:
            print('Error: Annotation not in set')
Return the count of references in this part's XML to the relationship
dataset/ETHPy150Open cidles/graf-python/src/graf/annotations.py/AnnotationSpace.remove--crossover with--dataset/ETHPy150Open scanny/python-pptx/pptx/opc/package.py/Part._rel_ref_count