bufferTag = StateTags.makeSystemTagInternal( StateTags.combiningValue( BUFFER_NAME, combineFn.getAccumulatorCoder(),
StateTags.combiningValue( "side-input-available-windows-" + sideInput.getTagInternal().getId(), SetCoder.of(windowCoder),
bufferTag = StateTags.makeSystemTagInternal( StateTags.combiningValue( BUFFER_NAME, combineFn.getAccumulatorCoder(),
StateTags.combiningValue( "side-input-available-windows-" + sideInput.getTagInternal().getId(), SetCoder.of(windowCoder),