code: protected function getOverrideValue($name, $overrides)
      {
          if ($this->isAllowedValue($name) && isset($overrides[$name])) {
              return $overrides[$name];
          }
  
          return $this->get($name);
      }
docs: Extract an override value.
  
  @param string $name      The name of the value.
  
  @param array  $overrides The overrides containing the values to be overridden.
  
  @return mixed