code: def PluginTagToContent(self, plugin_name):
      
      if plugin_name not in self._plugin_to_tag_to_content:
        raise KeyError('Plugin %r could not be found.' % plugin_name)
      return self._plugin_to_tag_to_content[plugin_name]
docs: Returns a dict mapping tags to content specific to that plugin.
  
      Args:
        plugin_name: The name of the plugin for which to fetch plugin-specific
          content.
  
      Raises:
        KeyError: if the plugin name is not found.
  
      Returns:
        A dict mapping tags to plugin-specific content (which are always strings).
        Those strings are often serialized protos.