code: def set_adapters(self, adapters):
          
  
          # check for the maximum adapters supported by the VM
          vm_info = yield from self._get_vm_info()
          chipset = "piix3"  # default chipset for VirtualBox VMs
          self._maximum_adapters = 8  # default maximum network adapter count for PIIX3 chipset
          if "chipset" in vm_info:
              chipset = vm_info["chipset"]
              max_adapter_string = "Maximum {} Network Adapter count".format(chipset.upper())
              if max_adapter_string in self._system_properties:
                  try:
                      self._maximum_adapters = int(self._system_properties[max_adapter_string])
                  except ValueError:
                      log.error("Could not convert system property to integer: {} = {}".format(max_adapter_string, self._system_properties[max_adapter_string]))
              else:
                  log.warning("Could not find system property '{}' for chipset {}".format(max_adapter_string, chipset))
  
          log.info("VirtualBox VM '{name}' [{id}] can have a maximum of {max} network adapters for chipset {chipset}".format(name=self.name,
                                                                                                                             id=self.id,
                                                                                                                             max=self._maximum_adapters,
                                                                                                                             chipset=chipset.upper()))
          if adapters > self._maximum_adapters:
              raise VirtualBoxError("The configured {} chipset limits the VM to {} network adapters. The chipset can be changed outside GNS3 in the VirtualBox VM settings.".format(chipset.upper(),
                                                                                                                                                                                    self._maximum_adapters))
  
          self._ethernet_adapters.clear()
          for adapter_number in range(0, adapters):
              self._ethernet_adapters[adapter_number] = EthernetAdapter()
  
          self._adapters = len(self._ethernet_adapters)
          log.info("VirtualBox VM '{name}' [{id}] has changed the number of Ethernet adapters to {adapters}".format(name=self.name,
                                                                                                                    id=self.id,
                                                                                                                    adapters=adapters))
docs: Sets the number of Ethernet adapters for this VirtualBox VM instance.
  
          :param adapters: number of adapters