eZ\Publish\Core\FieldType\FieldType::getSettingsSchema PHP Method

    public function getSettingsSchema()
    {
        return $this->settingsSchema;
    }

 /**
  * Returns a schema for the settings expected by the FieldType.
  *
  * Returns an arbitrary value, representing a schema for the settings of
  * the FieldType.
  *
  * Explanation: There are no possible generic schemas for defining settings
  * input, which is why no schema for the return value of this method is
  * defined. It is up to the implementer to define and document a schema for
  * the return value and document it. In addition, it is necessary that all
  * consumers of this interface (e.g. Public API, REST API, GUIs, ...)
  * provide plugin mechanisms to hook adapters for the specific FieldType
  * into. These adapters then need to be either shipped with the FieldType
  * or need to be implemented by a third party. If there is no adapter
  * available for a specific FieldType, it will not be usable with the
  * consumer.
  *
  * @return mixed
  */
 public function getSettingsSchema()
 {
     return $this->internalFieldType->getSettingsSchema();
 }