presto-main/src/main/java/io/prestosql/operator/NestedLoopJoinPagesBuilder.java/NestedLoopJoinPagesBuilder/NestedLoopJoinPagesBuilder
class NestedLoopJoinPagesBuilder:    NestedLoopJoinPagesBuilder(OperatorContext operatorContext)
    {
        this.operatorContext = requireNonNull(operatorContext, "operatorContext is null");
        this.pages = new ArrayList<>();
    }