code: public List<ErrorProneToken> getTokensForNode(Tree tree) {
      return ErrorProneTokens.getTokens(getSourceForNode(tree), context);
    }
docs: Returns the list of {@link Token}s for the given {@link JCTree}.
  
  <p>This is moderately expensive (the source of the node has to be re-lexed), so it should only
  be used if a fix is already going to be emitted.