code: public static String getName(ObjectIdentifier oid) {
          OIDInfo info = oidMap.get(oid);
          return (info == null) ? null : info.name;
      }
docs: Return user friendly name associated with the OID.
  
  @param oid the name of the object identifier to be returned.
  @return the user friendly name or null if no name
  is registered for this oid.