def setdefault(self, key, default): is_immutable(self)
def pop(self, index=-1): is_immutable(self)
def popitem(self): is_immutable(self)
def extend(self, iterable): is_immutable(self)
def insert(self, pos, value): is_immutable(self)
def __setitem__(self, key, value): is_immutable(self)
def add(self, item): is_immutable(self)
def __delitem__(self, key): is_immutable(self)