code: private void obtainSize(@NonNull final TypedArray typedArray) {
          Size defaultSize = Size.NORMAL;
          size = Size.fromValue(
                  typedArray.getInt(R.styleable.FloatingActionButton_size, defaultSize.getValue()));
      }
docs: Obtains the floating action button's size from a specific typed array.
  
  @param typedArray
  The typed array, the color should be obtained from, as an instance of the class
  {@link TypedArray}. The typed array may not be null