Return plugin information.

def get_info(self):
        """
        Return plugin information.

        """
        plugin_infos = {}
        for pc in self.plugins:
            plugin_infos.update(pc.get_info())
        return {
            self.get_plugin_name() : {
                "version"     : self.get_version(),
                "sub-plugins" : plugin_infos,
                "params" : {
                    "multi_plugins" : self.conf['multi_plugins']
                },
            }
        }