ddIsPathManaged and ddIspathManageable

As given in the description ddIspathManageable returns t  if the  specified path is supported by a design management system.
The function ddIspathManaged returns t if the specified path is currently managed by a design management system.Its given in the description that the path is managed if the file associated with the path is checked in.I have used the function ddIsPathManaged to check if the given path is checked in or not,Ideally it should return nil value if the path is never checked in but it is returning t .Is there a way to check if the given path is checked in or not?