src/Skeetr/Runtime/Overrides/Header.php
final public static function headers_list()
    {
        $results = array();
        foreach (self::$list as $headers) {
            $results = array_merge($results, $headers);
        }

        return $results;
    }
final public static function headers_list()
    {
        $results = array();
        foreach (self::$list as $headers) {
            $results = array_merge($results, $headers);
        }

        return $results;
    }
Returns a list of response headers ready to send

@link http://www.php.net/manual/en/function.headers_list.php

@return array Returns a numerically indexed array of headers.