def get_comments(self):
if self.retrieved:<EOL><INDENT>raise errors.IllegalState('<STR_LIT>')<EOL><DEDENT>self.retrieved = True<EOL>return objects.CommentList(self._results, runtime=self._runtime)<EOL>
Gets the comment list resulting from a search.

        return: (osid.commenting.CommentList) - the comment list
        raise:  IllegalState - list has already been retrieved
        *compliance: mandatory -- This method must be implemented.*