code: public void setActive(boolean active) {
          if (this.active != active) {
              this.active = active;
              inviteListener.setActive(active);
              acceptListener.setActive(active);
              participants.clear();
              participants.add(self);
              participantListener.setActive(active);
          }
      }
docs: Sets the listening state of the service. When set to false, the service stops listening to
  all events.
  
  @param active The active state.