public function configurarPagina($orientation = 'P', $unit = 'mm', $format = 'A4')
{
parent::FPDF($orientation, $unit, $format);
$this->SetFont('Arial', '', 8);
$this->horaImpressao = "Gerado em: " . $this->dataAtual() . " às " . $this->horaAtual();
}