src/ParameterParser/ParameterParser.php
private function prefixExists($parameter)
    {
        $prefixExists = false;

        foreach (array_keys($this->parameterCluster->prefixes) as $prefix) {
            if (substr($parameter, 0, strlen($prefix)) == $prefix) {
                $prefixExists = true;
                break;
            }
        }

        return $prefixExists;
    }
private function prefixExists($parameter)
    {
        $prefixExists = false;

        foreach (array_keys($this->parameterCluster->prefixes) as $prefix) {
            if (substr($parameter, 0, strlen($prefix)) == $prefix) {
                $prefixExists = true;
                break;
            }
        }

        return $prefixExists;
    }
Check if the prefix is defined in the parameter cluster.

@param string $parameter

@return bool