'Returns the size of the superset.
Examples
>>> from sympy.combinatorics.subsets import Subset
>>> a = Subset([\'c\', \'d\'], [\'a\', \'b\', \'c\', \'d\'])
>>> a.superset_size
4
See Also
subset, superset, size, cardinality'

@property
def superset_size(self):

    return len(self.superset)
