def METHOD_NAME():
    from zfit.core.space import add_spaces as add_spaces
    assert add_spaces(space1, space2) == space1
    assert add_spaces(space1, space2, space3) == space1
    with pytest.raises(ObsIncompatibleError):
        add_spaces(space1, space2, space3, space4)
    assert space1 + space2 == space1
    assert space1 + space2 + space3 == space1
    with pytest.raises(ObsIncompatibleError):
        space1.add(space2, space3, space4)
    with pytest.raises(ObsIncompatibleError):
        add_spaces(space1d_2, space2d_1)
    with pytest.raises(MultipleLimitsNotImplemented):
        add_spaces(space1d_2, space1d_1).limits