def add_options(self, parser, env=None):
<EOL>if env is None:<EOL><INDENT>env = os.environ<EOL><DEDENT>try:<EOL><INDENT>self.options(parser, env)<EOL>self.can_configure = True<EOL><DEDENT>except OptionConflictError as e:<EOL><INDENT>warn("<STR_LIT>"<EOL>"<STR_LIT>" % (self, e), RuntimeWarning)<EOL>self.enabled = False<EOL>self.can_configure = False<EOL><DEDENT>
Non-camel-case version of func name for backwards compatibility.

        .. warning ::

           DEPRECATED: Do not use this method,
           use :meth:`options <nose.plugins.base.IPluginInterface.options>`
           instead.