Returns all items of specified media type.

        :Args:
          - media_type: Media type for items we are searching for

        :Returns:
          Returns found items as tuple.

def get_items_of_media_type(self, media_type):
        """
        Returns all items of specified media type.

        :Args:
          - media_type: Media type for items we are searching for

        :Returns:
          Returns found items as tuple.
        """
        return (item for item in self.items if item.media_type == media_type)