question: public static VolumeGroupRestRep map ( VolumeGroup from ) { if ( from == null ) { return null ; } VolumeGroupRestRep rep = new VolumeGroupRestRep ( ) ; mapDataObjectFields ( from , rep ) ; rep . setDescription ( from . getDescription ( ) ) ; rep . setRoles ( from . getRoles ( ) ) ; rep . setParent ( toRelatedResource ( ResourceTypeEnum . VOLUME_GROUP , from . getParent ( ) ) ) ; rep . setMigrationGroupBy ( from . getMigrationGroupBy ( ) ) ; rep . setMigrationType ( from . getMigrationType ( ) ) ; return rep ; }
target:  Map an VolumeGroup to VolumeGroupRestRep