docs: public Map<Integer, Integer> getMigrationEffortByPoints(
          ProjectModelTraversal traversal, Set<String> includeTags, Set<String> excludeTags, Set<String> issueCategoryIDs,
          boolean recursive, boolean includeZero)
      {
          MapSumEffortAccumulatorFunction<Integer> accumulator = new MapSumEffortAccumulatorFunction(){
              public Object vertexToKey(Vertex effortReportVertex) {
                  Integer migrationEffort = (Integer)effortReportVertex.property(EffortReportModel.EFFORT).value();
                  return migrationEffort;
              }
          };
          getMigrationEffortDetails(traversal, includeTags, excludeTags, issueCategoryIDs, recursive, includeZero, accumulator);
          return accumulator.getResults();
      }