code: Comment comment() {
          if (comment == null) {
              String d = documentation();
              if (env.javaScriptScanner != null) {
                  env.javaScriptScanner.parse(d, new JavaScriptScanner.Reporter() {
                      @Override
                      public void report() {
                          env.error(DocImpl.this, "javadoc.JavaScript_in_comment");
                          throw new FatalError();
                      }
                  });
              }
              if (env.doclint != null
                      && treePath != null
                      && env.shouldCheck(treePath.getCompilationUnit())
                      && d.equals(getCommentText(treePath))) {
                  env.doclint.scan(treePath);
              }
              comment = new Comment(this, d);
          }
          return comment;
      }
docs: For lazy initialization of comment.