given:
        property."$method"()

        when:
        b.set(someOtherValue3())

        then:
        def e = thrown(IllegalStateException)
        e.message == 'The value for <b> is final and cannot be changed any further.'

        when:
        c.set(someOtherValue3())

        then:
        def e2 = thrown(IllegalStateException)

    }

    @Override
    C someOtherValue() {
        return toMutable(["s1"])
    }

    @Override
    C someOtherValue2() {
        return toMutable(["s2"])
    }

    @Override
    C someOtherValue3() {
        return toMutable(["s3"])
    }

    abstract AbstractCollectionProperty<String, C> property()

    abstract String getCollectionName()

    @Override

        return ['k1': 'v1']
    }

    @Override
    Map<String, String> someOtherValue2() {
        return ['k2': 'v2']
    }

    @Override
    Map<String, String> someOtherValue3() {
        return ['k3': 'v3']
    }

    @Override
    protected void setToNull(Object property) {
        property.set((Map) null)
    }

    @Override