code: public static boolean applyFontToTextView(final Context context, final TextView textView, final String filePath) {
          return applyFontToTextView(context, textView, filePath, false);
      }
docs: Useful for manually fonts to a TextView. Will not default back to font
  set in {@link uk.co.chrisjenx.calligraphy.CalligraphyConfig}
  
  @param context  Context
  @param textView Not null, TextView to apply to.
  @param filePath if null/empty will do nothing.
  @return true if fonts been applied