def _dir_additions(self):
rv = set()<EOL>for accessor in self._accessors:<EOL><INDENT>try:<EOL><INDENT>getattr(self, accessor)<EOL>rv.add(accessor)<EOL><DEDENT>except AttributeError:<EOL><INDENT>pass<EOL><DEDENT><DEDENT>return rv<EOL>
Add additional __dir__ for this object.