public MapStoreConfig setFactoryClassName(@Nonnull String factoryClassName) {
        this.factoryClassName = checkHasText(factoryClassName, "Map store factory class name must contain text");
        this.factoryImplementation = null;
        return this;
    }
@Test
    public void setFactoryClassName() {
        assertEquals("factoryClassName", cfgNonNullFactoryClassName.getFactoryClassName());
        assertEquals(new MapStoreConfig().setFactoryClassName("factoryClassName"), cfgNonNullFactoryClassName);
    }