API to find dimension value that belongs to group

Hi all,

I want to find find vaule of a dimension. This dimesionsion belongs to a feature that is in a group. I use method IpfcModelItemOwner.GetItemByName(epfcmodelitemtype.epfcitem_dimension, "abcd"). 

This code looks for the dimesion outside the group, but I need to find dimension which is inside the group

Please share your thought on this.