code: def Create(self, project_id, start_options=None, deadline=10):
      
      return DatastoreEmulator(self._emulator_cmd, self._working_directory,
                               project_id, deadline, start_options)
docs: Creates an emulator instance.
  
      This method will wait for up to 'deadline' seconds for the emulator to
      start.
  
      Args:
        project_id: project ID
        start_options: a list of additional command-line options to pass to the
            emulator 'start' command
        deadline: number of seconds to wait for the datastore to respond
  
      Returns:
        a DatastoreEmulator
  
      Raises:
        IOError: if the emulator could not be started within the deadline