<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def add_options(self, parser):
 """Add command-line options for this plugin. The base plugin class adds --with-$name by default, used to enable the plugin. """

        parser.add_option("--with-%s" % self.name,
                          action="store_true",
                          dest=self.enable_opt,
                          help="Enable plugin %s: %s" %
                          (self.__class__.__name__, self.help())
                          )