Neos\Flow\Property\PropertyMappingConfiguration::allowProperties PHP Method

    public function allowProperties()
    {
        foreach (func_get_args() as $propertyName) {
            $this->propertiesToBeMapped[$propertyName] = $propertyName;
        }
        return $this;
    }

 /**
  * Modify the passed $propertyMappingConfiguration according to the $propertyConfiguration which
  * has been generated by Fluid. In detail, if the $propertyConfiguration contains
  * an __identity field, we allow modification of objects; else we allow creation.
  *
  * All other properties are specified as allowed properties.
  *
  * @param array $propertyConfiguration
  * @param PropertyMappingConfiguration $propertyMappingConfiguration
  * @return void
  */
 protected function modifyPropertyMappingConfiguration($propertyConfiguration, PropertyMappingConfiguration $propertyMappingConfiguration)
 {
     if (!is_array($propertyConfiguration)) {
         return;
     }
     if (isset($propertyConfiguration['__identity'])) {
         $propertyMappingConfiguration->setTypeConverterOption(PersistentObjectConverter::class, PersistentObjectConverter::CONFIGURATION_MODIFICATION_ALLOWED, true);
         unset($propertyConfiguration['__identity']);
     } else {
         $propertyMappingConfiguration->setTypeConverterOption(PersistentObjectConverter::class, PersistentObjectConverter::CONFIGURATION_CREATION_ALLOWED, true);
     }
     foreach ($propertyConfiguration as $innerKey => $innerValue) {
         if (is_array($innerValue)) {
             $this->modifyPropertyMappingConfiguration($innerValue, $propertyMappingConfiguration->forProperty($innerKey));
         }
         $propertyMappingConfiguration->allowProperties($innerKey);
     }
 }