SMI-S EMC VNX storage groups

Our configuration has a storage group "~filestorage" having host running VNX "Operating Environment for file"

We are using Clar_LunMaskingSCSIProtocolController class to collect storage groups.

This class is returning the storage groups but not the storage group which has host which has filer OS.

Any reason why it listing all the storage groups which are listed in unisphere.

Do we have any other SMI-s class to collect storage group which are having storage system running VNX operating Environment.

note :VNX5300 is our vnx model