perf: #3574198 TypedDataManager prototypes should not include the parent context

      }

      // Create the prototype without any value, but with initial parenting

      // so that constructors can set up the objects correctly.

      $this->prototypes[$key] = $this->create($definition, NULL, $property_name, $object);

      $prototype = $this->create($definition, NULL, $property_name, $object);

      // Unset the parent so that it is not statically cached within the

      // prototype. It will be set again later anyway.

      $prototype->setContext(NULL, NULL);

      $this->prototypes[$key] = $prototype;

    }

    // Clone the prototype, update its parenting information, and assign the