This operation returns a subnetwork topological link given its name.

Operation Exceptions:
1. NOT_IMPLEMENTED - Raised if EMS cannot support this operation.
2. INTERNAL_ERROR - Raised in case of non-specific EMS internal failure.
3. INVALID_INPUT - Raised when topoLinkName does not reference a subnetwork topological link object.
4. ENTITY_NOT_FOUND - Raised when topoLinkName references a subnetwork topological link object that
    does not exist.
