code: public void submitTag() {
          final TagView inputTag = getInputTag();
          if (inputTag != null && inputTag.isInputAvailable()) {
              inputTag.endInput();
  
              if (mOnTagChangeListener != null) {
                  mOnTagChangeListener.onAppend(TagGroup.this, inputTag.getText().toString());
              }
              appendInputTag();
          }
      }
docs: Call this to submit the INPUT tag.