code: def RetrievePluginAsset(self, plugin_name, asset_name):
      
      return plugin_asset_util.RetrieveAsset(self.path, plugin_name, asset_name)
docs: Return the contents of a given plugin asset.
  
      Args:
        plugin_name: The string name of a plugin.
        asset_name: The string name of an asset.
  
      Returns:
        The string contents of the plugin asset.
  
      Raises:
        KeyError: If the asset is not available.