(self, task, player)
Adds observables to a player for the given task.

    Args:
      task: A `soccer.Task` instance.
      player: A `Walker` instance to which observables will be added.
Adds observables to a player for the given task.
Adds observables to a player for the given task .
def __call__(self, task, player):
    """Adds observables to a player for the given task.

    Args:
      task: A `soccer.Task` instance.
      player: A `Walker` instance to which observables will be added.
    """
def __call__ ( self , task , player ) :