code: public void generate() {
  
      PsiElementFactory elementFactory = JavaPsiFacade.getElementFactory(psiClass.getProject());
      JavaCodeStyleManager styleManager = JavaCodeStyleManager.getInstance(psiClass.getProject());
  
      // Clear any previous
      clearPrevious();
  
      // Implements parcelable
      makeClassImplementParcelable(elementFactory, styleManager);
  
      // @ParcelablePlease Annotation
      addAnnotation(elementFactory, styleManager);
  
      // Creator
      PsiField creatorField = elementFactory.createFieldFromText(generateCreator(), psiClass);
  
      // Describe contents method
      PsiMethod describeContentsMethod =
          elementFactory.createMethodFromText(generateDescribeContents(), psiClass);
  
      // Method for writing to the parcel
      PsiMethod writeToParcelMethod =
          elementFactory.createMethodFromText(generateWriteToParcel(), psiClass);
  
      styleManager.shortenClassReferences(
          psiClass.addBefore(describeContentsMethod, psiClass.getLastChild()));
  
      styleManager.shortenClassReferences(
          psiClass.addBefore(writeToParcelMethod, psiClass.getLastChild()));
  
      styleManager.shortenClassReferences(psiClass.addBefore(creatorField, psiClass.getLastChild()));
    }
docs: Generate and insert the Parcel and ParcelablePlease code