How to get information about groups (member groups, element groups, node groups,..) in OpenSTAAD V8i SS6

In previous versions of OpenSTAAD (prior to OpenSTAAD V8i SS6)  information about member groups, element groups, node groups can be obtained through Functions Related to Groups as:  GetNumberOfGROUPS, GetNumberOfGROUPTypes, GetGROUPNamesForType, GetNumberOfEntitiesInGROUP, GetAllEntitiesInGROUP. I cannot find simmilar functions in OpenSTAAD V8i (SS6). What is the procedure to get group information in OpenSTAAD V8i (SS6)?