def METHOD_NAME(self,sign=0):
    r"""
    Return the space of modular symbols attached to this space, with the given sign (default 0).
    TESTS::
        sage: K.<i> = QuadraticField(-1)
        sage: chi = DirichletGroup(5, base_ring = K).0
        sage: L.<c> = K.extension(x^2 - 402*i)
        sage: M = ModularForms(chi, 7, base_ring = L)
        sage: symbs = M.modular_symbols()
        sage: symbs.character() == chi
        True
        sage: symbs.base_ring() == L
        True
    """
    sign = ZZ(sign)
    return self.__M.METHOD_NAME(sign).change_ring(self.base_ring())