function hasImplementation($nameOrAlias)
    {
        #! When Service Extend From Another Must Have Same Implementation Rules
        $nameOrAlias = $this->getExtended($nameOrAlias);
        $nameOrAlias = $this->_normalizeName($nameOrAlias);

        return (
            isset($this->implementations[$nameOrAlias])
                ? $this->implementations[$nameOrAlias]
                : false
        );
    }