Getting level0 count for the top nodes in the hierarchy

Summary: There is a requirement to find out the level0 zero count for all the top nodes in the account dimension. We have total 6 top nodes in the viewpoint for Account. Now the requirement is to check the count of Level0 members for 4 top nodes which is 4 different hierarchies sharing the base level members and the count of level0 or base level members should remain same in all 4 hierarchies. There may be orphan parents in the hierarchies which we need to ignore while calculating level0 count. To differentiate the child member and parent members, we have child