public function prepare(string $string): string
    {
        foreach ($this->_steps as $step) {
            $string = $step->apply($string);
        }
        return $string;
    }
public function prepare(string $string): string
    {
        foreach ($this->_steps as $step) {
            $string = $step->apply($string);
        }
        return $string;
    }
public function prepare ( string $ string ) : string { foreach ( $ this -> _steps as $ step ) { $ string = $ step -> apply ( $ string ) ; } return $ string ; }
Prepare string.

@param string $string
@return string
Prepare string .