This operation is used by the NMS to retrieve the details of the protection group.

Operation Exceptions:
1. INTERNAL_ERROR - Raised in case of non-specific EMS internal failure.
2. INVALID_INPUT - Raised when protectionGroupName does not reference a ProtectionGroup object.
3. ENTITY_NOT_FOUND - Raised when protectionGroupName references an object
    which does not exist.
4. NE_COMM_LOSS - Raised when communication to managed element is lost.
