code: public JsonDeserializationException traceError( String message, JsonReader reader ) {
          getLogger().log( Level.SEVERE, message );
          traceReaderInfo( reader );
          return new JsonDeserializationException( message );
      }
docs: Trace an error with current reader state and returns a corresponding exception.
  
  @param message error message
  @param reader current reader
  
  @return a {@link JsonDeserializationException} with the given message