transformer.putResultDataBody(dataMap, "nullable", "actualValue");

        Object result = dataMap.get("nullable");
        assertTrue(result instanceof Object[]);
        Object[] resultArray = (Object[]) result;
        assertEquals(2, resultArray.length);
        assertNull(resultArray[0]);
        assertEquals("actualValue", resultArray[1]);
    }

    /**

t(calculatedValue))}px`)\n    }\n\n    this._applyManipulationCallback(selector, manipulationCallBack)\n  }\n\n  _saveInitialAttribute(element, styleProperty) {\n    const actualValue = element.style.getPropertyValue(styleProperty)\n    if (actualValue) {\n      Manipulator.setDataAttribute(element, styleProperty, actualValue)\n    }\n  }\n\n  _resetElementAttributes(selector, styleProperty) {\n    const manipulationCallBack = element => {\n      const value = Manipulator.getDataAttribute(element,...