protected function string($data)
    {
        return \str_pad(
            $data,
            $this->depth * $this->length,
            $this->charPad,
            $this->typePad
        );
    }
protected function string($data)
    {
        return \str_pad(
            $data,
            $this->depth * $this->length,
            $this->charPad,
            $this->typePad
        );
    }
@param string $data

@return string