public function getOutputLine(int $line): string
    {
        return array_key_exists($line, $this->output) ? $this->output[$line] : null;
    }
public function getOutputLine(int $line): string
    {
        return array_key_exists($line, $this->output) ? $this->output[$line] : null;
    }
public function getOutputLine ( int $ line ) : string { return array_key_exists ( $ line , $ this -> output ) ? $ this -> output [ $ line ] : null ; }
Get a specific line from the output array

@param int $line
@return string|null
Get a specific line from the output array