code: void registerPrefetchCall(@NotNull ApolloPrefetch apolloPrefetch) {
      checkNotNull(apolloPrefetch, "apolloPrefetch == null");
      OperationName operationName = apolloPrefetch.operation().name();
      registerCall(activePrefetchCalls, operationName, apolloPrefetch);
    }
docs: <p>Adds provided {@link ApolloPrefetch} that is currently in progress.</p>
  
  <p><b>Note</b>: This method needs to be called right before a prefetch call is executed.</p>