code: public static <V> Fiber<V> start(SuspendableCallable<V> target) {
          return create(target).start();
      }
docs: Creates a new child Fiber from the given {@link SuspendableCallable}.
  This constructor may only be called from within another fiber. This fiber will use the same fork/join pool as the creating fiber.
  The new fiber has no name, and uses the default initial stack size.
  
  @param target the SuspendableRunnable for the Fiber.
  @throws IllegalArgumentException when stackSize is &lt;= 0