code: private void obtainHelperTextColor(@NonNull final TypedArray typedArray) {
          setHelperTextColor(typedArray.getColor(R.styleable.AbstractValidateableView_helperTextColor,
                  ContextCompat.getColor(getContext(), R.color.default_helper_text_color)));
      }
docs: Obtains the color of the helper text from a specific typed array.
  
  @param typedArray
  The typed array, the color of the helper text should be obtained from, as an instance
  of the class {@link TypedArray}. The typed array may not be null