def listPluginTypeInfo():
    """ Return a sequence of mappings describing our plugin types.

        o Keys for the mappings must include:

          'id' -- a string used to identify the plugin type (should be
            the __name__ of the interface)

          'interface' -- the plugin type interface

          'methods' -- the methods expected by the plugin type interface

          'title' -- a display title for the plugin type

          'description' -- a description of what the plugins do
        """
