Jarves\Admin\AppKernelModifier::eatBackUntil PHP Method

    public function eatBackUntil($string)
    {
        $position = $this->position;
        $stringLength = strlen($string);
        do {
            $position -= $stringLength;
            $currentString = substr($this->script, $position - $stringLength, $stringLength);
        } while ($currentString !== $string && $position >= 0);
        $length = $this->position - $position;
        if ($position) {
            $this->script = substr($this->script, 0, $position) . substr($this->script, $this->position);
            $this->length -= $this->position - $position;
            $this->position -= $this->position - $position;
        }
        return $length;
    }