code: def get_qemus(self):
          
          qemu_vm_list = []
          qemu_vm_max = None
          for node in self.nodes:
              if node['type'] == 'QemuVM':
                  qemu_vm_list.append(node['qemu_id'])
  
          if len(qemu_vm_list) > 0:
              qemu_vm_max = max(qemu_vm_list)
          return qemu_vm_max
docs: Get the maximum ID of the Qemu VMs
  
          :return: Maximum Qemu VM ID
          :rtype: int