public function fetchByAlias($strTable, $strAlias, $varValue)
{
if (isset($this->arrAliases[$strTable][$strAlias][$varValue])) {
$strPk = $this->arrAliases[$strTable][$strAlias][$varValue];
if (isset($this->arrRegistry[$strTable][$strPk])) {
return $this->arrRegistry[$strTable][$strPk];
}
}
return null;
}