docs: protected TwoPhaseCommitSinkFunction<IN, TXN, CONTEXT> enableTransactionTimeoutWarnings(
  		double warningRatio) {
  		checkArgument(warningRatio >= 0 && warningRatio <= 1,
  			"warningRatio must be in range [0,1]");
  		this.transactionTimeoutWarningRatio = warningRatio;
  		return this;
  	}