removeListener(harvest) {
    let observer = this.observers[harvest._id];
    if(!_.isUndefined(observer) && !_.isNull(observer)) {
      observer.stop();
      delete this.observers[harvest._id];
    }
  }
/**
   * Stops and removes a listener for harvest
   */
Stops and removes a listener for harvest
Stops and removes a listener for harvest
removeListener(harvest) {
    let observer = this.observers[harvest._id];
    if(!_.isUndefined(observer) && !_.isNull(observer)) {
      observer.stop();
      delete this.observers[harvest._id];
    }
  }
removeListener ( harvest ) { let observer = this . observers [ harvest . _id ] ; if ( ! _ . isUndefined ( observer ) && ! _ . isNull ( observer ) ) { observer . stop ( ) ; delete this . observers [ harvest . _id ] ; } }
Stops and removes a listener for harvest
Stops and removes a listener for harvest