code: def _get_host_only_mac_address():
      
      # Get the number of the host-only adapter
      vm_config = _get_vm_config()
      for line in vm_config:
          if line.startswith('hostonlyadapter'):
              adapter_number = int(line[15:16])
              break
      else:
          raise ValueError('No host-only adapter is defined for the Dusty VM')
  
      for line in vm_config:
          if line.startswith('macaddress{}'.format(adapter_number)):
              return line.split('=')[1].strip('"').lower()
      raise ValueError('Could not find MAC address for adapter number {}'.format(adapter_number))
docs: Returns the MAC address assigned to the host-only adapter,
      using output from VBoxManage. Returned MAC address has no colons
      and is lower-cased.