/**
* @throws UnableToBuild when the source provides something
* else than an object.
* @return mixed builder object
*/
private function getBuilderBasedOn(BuilderObjectProductBuildPlan $p)
{
$builderSource = $p->getBuilderSource();
$builder = $this->objectResolver->resolveValueFrom($builderSource);
if (!is_object($builder)) {
throw new UnableToBuild();
}
return $builder;
}
