@Nullable
  public static Fix addSuppressWarnings(VisitorState state, String warningToSuppress) {
    return addSuppressWarnings(state, warningToSuppress, null);
  }
@ Nullable public static Fix addSuppressWarnings ( VisitorState state , String warningToSuppress ) { return addSuppressWarnings ( state , warningToSuppress , null ) ; }
Returns a fix that adds a {@code @SuppressWarnings(warningToSuppress)} to the closest
suppressible element to the node pointed at by {@code state.getPath()}.

@see #addSuppressWarnings(VisitorState, String, String)