RollUpInSet

This function returns a set of children (or grandchildren, etc.) of the grandparent (or great-grandparent, etc.) of Member from the Set. When there is a 'non-visible' child of Member but there is a grandchild in the Set, the function returns also the grandchild. The same is true for great-grandchild, etc. If there is no grandparent (or great-grandparent) of Member the function returns ExpandLevels(1, "Set"), meaning root elements.

The RollUpInSet function retains duplicates.