code: public void decline(List<OfferID> offerIds) {
      Builder decline = build().setDecline(Decline.newBuilder().addAllOfferIds(offerIds));
      sendCall(decline, Type.DECLINE);
    }
docs: Sent by the scheduler to explicitly decline offer(s) received. Note that this is same as sending an
  ACCEPT call with no operations.
  
  @param offerIds