docs: def destroy_vm_vdis(name=None, session=None, call=None):
      '''
      Get virtual block devices on VM
  
      .. code-block:: bash
  
          salt-cloud -a destroy_vm_vdis  xenvm01
  
      '''
      if session is None:
          session = _get_session()
      ret = {}
      # get vm object
      vms = session.xenapi.VM.get_by_name_label(name)
      if len(vms) == 1:
          # read virtual block device (vdb)
          vbds = session.xenapi.VM.get_VBDs(vms[0])
          if vbds is not None:
              x = 0
              for vbd in vbds:
                  vbd_record = session.xenapi.VBD.get_record(vbd)
                  if vbd_record['VDI'] != 'OpaqueRef:NULL':
                      # read vdi on vdb
                      vdi_record = session.xenapi.VDI.get_record(
                          vbd_record['VDI'])
                      if 'iso' not in vdi_record['name_label']:
                          session.xenapi.VDI.destroy(vbd_record['VDI'])
                          ret['vdi-{}'.format(x)] = vdi_record['name_label']
                  x += 1
      return ret