code: def modelstandardfunctions(self):
          
          lines = Lines()
          lines.extend(self.doit)
          lines.extend(self.iofunctions)
          lines.extend(self.new2old)
          lines.extend(self.run)
          lines.extend(self.update_inlets)
          lines.extend(self.update_outlets)
          lines.extend(self.update_receivers)
          lines.extend(self.update_senders)
          return lines
docs: Standard functions of the model class.