private function throwRequired(array $configuration)
    {
        $missing = [];

        foreach ($this->definitions as $key => $def) {
            if (empty($def['required'])
                || isset($def['default'])
                || array_key_exists($key, $configuration)
            ) {
                continue;
            }
            $missing[] = $key;
        }

        $msg = "Missing required configuration options: \n\n";
        $msg .= implode("\n\n", $missing);
        throw new \InvalidArgumentException($msg);
    }
private function throwRequired(array $configuration)
    {
        $missing = [];

        foreach ($this->definitions as $key => $def) {
            if (empty($def['required'])
                || isset($def['default'])
                || array_key_exists($key, $configuration)
            ) {
                continue;
            }
            $missing[] = $key;
        }

        $msg = "Missing required configuration options: \n\n";
        $msg .= implode("\n\n", $missing);
        throw new \InvalidArgumentException($msg);
    }
private function throwRequired ( array $ configuration ) { $ missing = [ ] ; foreach ( $ this -> definitions as $ key => $ def ) { if ( empty ( $ def [ 'required' ] ) || isset ( $ def [ 'default' ] ) || array_key_exists ( $ key , $ configuration ) ) { continue ; } $ missing [ ] = $ key ; } $ msg = "Missing required configuration options: \n\n" ; $ msg .= implode ( "\n\n" , $ missing ) ; throw new \ InvalidArgumentException ( $ msg ) ; }
@param array $configuration Associative array of configuration options.

@throws \InvalidArgumentException.
@param array $configuration Associative array of configuration options .