private function get($property_key)
    {
        $found = false;

        $ret = $this->getValue($property_key, null, $found);

        if (false === $found) {
            throw new InvalidArgumentException("Parameter '$property_key' not found in configuration file.");
        }

        return $ret;
    }
private function get($property_key)
    {
        $found = false;

        $ret = $this->getValue($property_key, null, $found);

        if (false === $found) {
            throw new InvalidArgumentException("Parameter '$property_key' not found in configuration file.");
        }

        return $ret;
    }
private function get ( $ property_key ) { $ found = false ; $ ret = $ this -> getValue ( $ property_key , null , $ found ) ; if ( false === $ found ) { throw new InvalidArgumentException ( "Parameter '$property_key' not found in configuration file." ) ; } return $ ret ; }
Return the value correspondent to a given key.

@param mixed $property_key The key, in the configuration values array, to return the respective value

@return mixed
@throws \Propel\Common\Config\Exception\InvalidArgumentException when non-existent key in configuration array
Return the value correspondent to a given key .