<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def __register_methods(self, parsed_config):
 """Register all methods from the given api config file. Methods are stored in a map from method_name to rosyMethod, the name of the ProtoRPC method to be called on the backend. If no rosyMethod was specified the value will be None. Args: parsed_config: The JSON object with the API configuration being added. """

    methods = parsed_config.get('methods')
    if not methods:
      return

    for method_name, method in methods.iteritems():
      self.__api_methods[method_name] = method.get('rosyMethod')