Android Extensions not support flavorDimensions

[sw926]

build.gradle is like this

android {
	
    defaultConfig {
    	...
        flavorDimensions "app", "type"
        ...
    }

  	...

    productFlavors {
        app1 {
           ...
        }
        app2 {
        	...
        }

        production {
			...
        }

        internal {
			...
        }
    }
    ...
}

Android Extensions not recognize ‘src/app1Internal/res’