(exp)
return _contains(exp, Sorted)
Does `exp` contain a `Reduced` node.
Does `exp` contain a `Reduced` node.
Does exp contain a Reduced node .
def is_sorted(exp):
    """Does `exp` contain a `Reduced` node."""
    return _contains(exp, Sorted)
def is_sorted ( exp ) : return _contains ( exp , Sorted )