presto-main/src/main/java/io/prestosql/operator/exchange/LocalExchangeSourceOperator.java/LocalExchangeSourceOperator/LocalExchangeSourceOperator
class LocalExchangeSourceOperator:    public LocalExchangeSourceOperator(OperatorContext operatorContext, LocalExchangeSource source)
    {
        this.operatorContext = requireNonNull(operatorContext, "operatorContext is null");
        this.source = requireNonNull(source, "source is null");
        operatorContext.setInfoSupplier(source::getBufferInfo);
    }