def METHOD_NAME():
    test_substance = Substance()
    test_substance.add_component(
        Component("C", role=Component.Role.Solute),
        ExactAmount(1),
    )
    test_substance.add_component(
        Component("CC", role=Component.Role.Ligand),
        ExactAmount(1),
    )
    test_substance.add_component(
        Component("CCC", role=Component.Role.Receptor),
        ExactAmount(1),
    )
    test_substance.add_component(
        Component("O", role=Component.Role.Solvent),
        MoleFraction(1.0),
    )
    return test_substance