def has_element(self, elem: MathObject) -> bool:
"""Return ``True`` if ``elem`` is an element of this ``Multiset``. ``elem`` must be a `MathObject`.
For a more relaxed version (that auto-converts non-`MathObject` arguments into instances of
:class:`~.Atom`) see `__contains__` and the construct ``elem in Multiset``.
"""
raise_if_not_mathobject(elem)
return elem in self.data
def get_multiplicity(self, elem: MathObject) -> int:
"""Return ``int`` if ``elem`` is an element of this ``Multiset`` where the value is the
number of multiples for ``elem``. ``elem`` must be a `MathObject`.
"""
raise_if_not_mathobject(elem)
return self.data[elem]
