code: public <T, T1> FutureValue<T> futureCall(
        Job1<T, T1> jobInstance, Value<? extends T1> v1, JobSetting... settings) {
      return futureCallUnchecked(settings, jobInstance, v1);
    }
docs: Invoke this method from within the {@code run} method of a <b>generator
  job</b> in order to specify a job node in the generated child job graph.
  This version of the method is for child jobs that take one argument.
  
  @param <T> The return type of the child job being specified
  @param <T1> The type of the first input to the child job
  @param jobInstance A user-written job object
  @param v1 the first input to the child job
  @param settings Optional one or more {@code JobSetting}
  @return a {@code FutureValue} representing an empty value slot that will be
  filled by the output of {@code jobInstance} when it finalizes. This
  may be passed in to further invocations of {@code futureCall()} in
  order to specify a data dependency.