code: public void callFunction(
        final String name,
        final List<?> args,
        final @Nullable Long requestTimeout) {
      this.functionService.callFunction(name, args, requestTimeout);
    }
docs: Calls the specified Stitch function.
  
  @param name the name of the Stitch function to call.
  @param args the arguments to pass to the Stitch function.
  @param requestTimeout the number of milliseconds the client should wait for a response from the
  server before failing with an error.