parameters: (callback, messages=None)
docstring: Remove a listener so that it doesn't get sent messages for msgtype. If
      msgtype is not specified the listener will be removed for all msgtypes that
      it is associated with.
      @param callback: Function or bound method to remove subscription for
      @keyword messages: EDMSG_* val or list of EDMSG_* vals
docstring_summary: Remove a listener so that it doesn't get sent messages for msgtype. If
      msgtype is not specified the listener will be removed for all msgtypes that
      it is associated with.
      @param callback: Function or bound method to remove subscription for
      @keyword messages: EDMSG_* val or list of EDMSG_* vals
docstring_tokens: Remove a listener so that it doesn t get sent messages for msgtype . If msgtype is not specified the listener will be removed for all msgtypes that it is associated with . @param callback : Function or bound method to remove subscription for @keyword messages : EDMSG_ * val or list of EDMSG_ * vals
function: def Unsubscribe(callback, messages=None):
      """Remove a listener so that it doesn't get sent messages for msgtype. If
      msgtype is not specified the listener will be removed for all msgtypes that
      it is associated with.
      @param callback: Function or bound method to remove subscription for
      @keyword messages: EDMSG_* val or list of EDMSG_* vals
  
      """    
      Publisher().unsubscribe(callback, messages)
function_tokens: def Unsubscribe ( callback , messages = None ) : Publisher ( ) . unsubscribe ( callback , messages )