/**
* Sets the keys, processing the array key.
*
* When an array key is numeric \MUtil_Model::REQUEST_ID is used.
* When there is more than one key a increasing number is added to
* \MUtil_Model::REQUEST_ID starting with 1.
*
* String key names are left as is.
*
* @param array $keys [alternative_]name or number => name
* @return \MUtil_Model_ModelAbstract (continuation pattern)
*/
public function setKeys(array $keys)
{
if (!isset($keys[$this->_modelField])) {
$keys[$this->_modelField] = $this->_modelField;
}
return parent::setKeys($keys);
}