I would like to print two qweb-reports with just one button. Both reports are using different models.

For example I want to print an invoice and a picking report together. So I need to merge the following methods:

def action_invoice(self):
	return self.env['report'].get_action(self, 'account.report_invoice‘)

def action_picking(self):
	return self.env['report'].get_action(self, 'stock.report_picking‘)

Is there a way to combine both methods/actions in one method for binding it to a button?