code: public static void setInternalComments(Node node, ParserRuleContext parserRuleContext, AdapterParameters adapterParameters) {
          BufferedTokenStream tokens = adapterParameters.getTokens();
  
          if (node == null || parserRuleContext == null || tokens == null) {
              throw new IllegalArgumentException("Parameters must not be null");
          }
  
          Token startToken = parserRuleContext.getStart();
          Token stopToken = parserRuleContext.getStop();
  
          List<Token> commentTokens;
          List<Comment> internalCommentList = new LinkedList<Comment>();
  
          // Checking to the right of the start token will check inside the statement
          commentTokens = tokens.getHiddenTokensToRight(startToken.getTokenIndex(), Java7Lexer.COMMENTS);
          if (commentTokens != null) {
              for (Token commentToken : commentTokens) {
  
                  // Skip already claimed comments (prevents comment repeats)
                  if (adapterParameters.isCommentTokenClaimed(commentToken.getTokenIndex())) {
                      continue;
                  } else {
                      // Claim it
                      adapterParameters.claimCommentToken(commentToken.getTokenIndex());
                  }
  
                  if (commentToken.getText().startsWith("/**")) {
                      JavadocComment javadocComment = new JavadocComment(commentToken.getText());
                      internalCommentList.add(javadocComment);
                  } else if (commentToken.getText().startsWith("/*")) {
                      BlockComment blockComment = new BlockComment(commentToken.getText());
                      internalCommentList.add(blockComment);
                  } else if (commentToken.getText().startsWith("//")) {
                      LineComment lineComment = new LineComment(commentToken.getText());
                      internalCommentList.add(lineComment);
                  }
              }
          }
  
          if (internalCommentList.size() > 0) {
              if (node.getInternalComments() != null) {
                  node.getInternalComments().addAll(internalCommentList);
              } else {
                  node.setInternalComments(internalCommentList);
              }
          }
      }
docs: If there are no statements within a block, we need a special method to grab any comments that
  might exist between braces.
  
  @param node
  @param parserRuleContext
  @param adapterParameters