@Override public <InputT, AccumT, OutputT> CombiningState<InputT, AccumT, OutputT> bindCombiningWithContext( String id, StateSpec<CombiningState<InputT, AccumT, OutputT>> spec, Coder<AccumT> accumCoder, CombineFnWithContext<InputT, AccumT, OutputT> combineFn) { return binder.bindCombiningValueWithContext(tagForSpec(id, spec), accumCoder, combineFn); }