code: public static void addSuppressWarnings(
        Builder fixBuilder, VisitorState state, String warningToSuppress) {
      addSuppressWarnings(fixBuilder, state, warningToSuppress, null);
    }
docs: Modifies {@code fixBuilder} to either create a new {@code @SuppressWarnings} element on the
  closest suppressible node, or add {@code warningToSuppress} to that node if there's already a
  {@code SuppressWarnings} annotation there.
  
  @see #addSuppressWarnings(VisitorState, String, String)