| 
                                Change Parameter Type	sortedPages : Iterator<Page> to sortedPages : WorkProcessor<Page> in method public MergingHashAggregationBuilder(accumulatorFactories List<AccumulatorFactory>, step AggregationNode.Step, expectedGroups int, groupByTypes List<Type>, hashChannel Optional<Integer>, operatorContext OperatorContext, sortedPages WorkProcessor<Page>, systemMemoryContext LocalMemoryContext, memoryLimitForMerge long, overwriteIntermediateChannelOffset int, joinCompiler JoinCompiler) in class com.facebook.presto.operator.aggregation.builder.MergingHashAggregationBuilder | 
                                From | 
                                To | 
                            
                            
                            
                                 | 
                                Change Parameter Type	sortedPages : Iterator<Page> to sortedPages : WorkProcessor<Page> in method private mergeSortedPages(sortedPages WorkProcessor<Page>, memoryLimitForMerge long) : WorkProcessor<Page> in class com.facebook.presto.operator.aggregation.builder.SpillableHashAggregationBuilder | 
                                From | 
                                To | 
                            
                            
                            
                            
                            
                            
                            
                                 | 
                                Change Return Type	Iterator<Page> to WorkProcessor<Page> in method private mergeFromDisk() : WorkProcessor<Page> in class com.facebook.presto.operator.aggregation.builder.SpillableHashAggregationBuilder | 
                                From | 
                                To | 
                            
                            
                            
                                 | 
                                Change Return Type	Iterator<Page> to WorkProcessor<Page> in method public buildHashSortedResult() : WorkProcessor<Page> in class com.facebook.presto.operator.aggregation.builder.InMemoryHashAggregationBuilder | 
                                From | 
                                To | 
                            
                            
                            
                                 | 
                                Change Return Type	Iterator<Page> to WorkProcessor<Page> in method public buildResult() : WorkProcessor<Page> in class com.facebook.presto.operator.aggregation.builder.SpillableHashAggregationBuilder | 
                                From | 
                                To | 
                            
                            
                            
                                 | 
                                Change Return Type	Iterator<Page> to WorkProcessor<Page> in method public buildResult() : WorkProcessor<Page> in class com.facebook.presto.operator.aggregation.builder.InMemoryHashAggregationBuilder | 
                                From | 
                                To | 
                            
                            
                            
                                 | 
                                Change Return Type	Iterator<Page> to WorkProcessor<Page> in method private mergeSortedPages(sortedPages WorkProcessor<Page>, memoryLimitForMerge long) : WorkProcessor<Page> in class com.facebook.presto.operator.aggregation.builder.SpillableHashAggregationBuilder | 
                                From | 
                                To | 
                            
                            
                            
                                 | 
                                Change Return Type	Iterator<Page> to WorkProcessor<Page> in method private mergeFromDiskAndMemory() : WorkProcessor<Page> in class com.facebook.presto.operator.aggregation.builder.SpillableHashAggregationBuilder | 
                                From | 
                                To | 
                            
                            
                            
                                 | 
                                Change Return Type	Iterator<Page> to WorkProcessor<Page> in method public buildResult() : WorkProcessor<Page> in class com.facebook.presto.operator.aggregation.builder.HashAggregationBuilder | 
                                From | 
                                To | 
                            
                            
                            
                                 | 
                                Change Return Type	Iterator<Page> to WorkProcessor<Page> in method public buildResult() : WorkProcessor<Page> in class com.facebook.presto.operator.aggregation.builder.MergingHashAggregationBuilder | 
                                From | 
                                To | 
                            
                            
                            
                                 | 
                                Change Return Type	Iterator<Page> to WorkProcessor<Page> in method private buildResult(groupIds IntIterator) : WorkProcessor<Page> in class com.facebook.presto.operator.aggregation.builder.InMemoryHashAggregationBuilder | 
                                From | 
                                To | 
                            
                            
                            
                            
                            
                            
                            
                                 | 
                                Change Variable Type	mergedPage : Iterator<Page> to mergedPage : WorkProcessor<Page> in method public testBinaryMergeIteratorOverEmptyPageAndNonEmptyPage() : void in class com.facebook.presto.operator.TestMergeHashSort | 
                                From | 
                                To | 
                            
                            
                            
                                 | 
                                Change Variable Type	mergedSpilledPages : Iterator<Page> to mergedSpilledPages : WorkProcessor<Page> in method private mergeFromDisk() : WorkProcessor<Page> in class com.facebook.presto.operator.aggregation.builder.SpillableHashAggregationBuilder | 
                                From | 
                                To | 
                            
                            
                            
                                 | 
                                Change Variable Type	mergedPages : Iterator<Page> to mergedPages : WorkProcessor<Page> in method public testBinaryMergeIteratorOverPageWithDifferentHashes() : void in class com.facebook.presto.operator.TestMergeHashSort | 
                                From | 
                                To | 
                            
                            
                            
                                 | 
                                Change Variable Type	mergedPage : Iterator<Page> to mergedPage : WorkProcessor<Page> in method public testBinaryMergeIteratorOverPageWith() : void in class com.facebook.presto.operator.TestMergeHashSort | 
                                From | 
                                To | 
                            
                            
                            
                                 | 
                                Change Variable Type	mergedSpilledPages : Iterator<Page> to mergedSpilledPages : WorkProcessor<Page> in method private mergeFromDiskAndMemory() : WorkProcessor<Page> in class com.facebook.presto.operator.aggregation.builder.SpillableHashAggregationBuilder | 
                                From | 
                                To | 
                            
                            
                            
                                 | 
                                Change Variable Type	mergedPage : Iterator<Page> to mergedPage : WorkProcessor<Page> in method public testBinaryMergeIteratorOverEmptyPage() : void in class com.facebook.presto.operator.TestMergeHashSort | 
                                From | 
                                To |