def METHOD_NAME():
    def test():
        return 3
    class Test:
        def __init__(self):
            self.a = 2
    a = {(1, 2): 3}
    b = {Test(): 3}
    c = {test: 3}
    for el in [a, b, c]:
        o_ser = hashing.get_json(el)
        dict_o = json.loads(o_ser)
        # check if this is an int (it meant that the lkey has been hashed)
        assert int(list(dict_o.keys())[0])