presto-main/src/main/java/io/prestosql/operator/NestedLoopBuildOperator.java/NestedLoopBuildOperator/NestedLoopBuildOperator
class NestedLoopBuildOperator:    public NestedLoopBuildOperator(OperatorContext operatorContext, NestedLoopJoinBridge nestedLoopJoinBridge)
    {
        this.operatorContext = requireNonNull(operatorContext, "operatorContext is null");
        this.nestedLoopJoinBridge = requireNonNull(nestedLoopJoinBridge, "nestedLoopJoinBridge is null");
        this.nestedLoopJoinPagesBuilder = new NestedLoopJoinPagesBuilder(operatorContext);
        this.localUserMemoryContext = operatorContext.localUserMemoryContext();
    }