def list_plugins(self):
rv = []<EOL>for _, modname, ispkg in pkgutil.iter_modules(self.mod.__path__):<EOL><INDENT>rv.append(modname)<EOL><DEDENT>return sorted(rv)<EOL>
Returns a sorted list of all plugins that are available in this
        plugin source.  This can be useful to automatically discover plugins
        that are available and is usually used together with
        :meth:`load_plugin`.