I am creating volumes using nested ...I want to print the volume id(UUID) for each volume I create. I tried different ways nothing seems to work i am lost...

base_template

    parameters:

      vfl_prb_volume_name:
       type: comma_delimited_list
       description: VolumeName for vfl probe instances
      vfl_prb_vol_size:
       type: comma_delimited_list
       label: volume_size
       description: Volumesize for probes

    resources:
     vfl_prb_3_vol_0:
        type: nested_vfl_prb_volume.yaml
        properties:
         vfl_prb_volume_name: { get_param: [vfl_prb_volume_name, 0] } 
         vfl_prb_vol_size: { get_param: [vfl_prb_vol_size, 0] }
     vfl_prb_4_vol_0:
        type: nested_vfl_prb_volume.yaml
        properties:
         vfl_prb_volume_name: { get_param: [vfl_prb_volume_name, 1] }
         vfl_prb_vol_size: { get_param: [vfl_prb_vol_size, 1] }

nested template

parameters:

  vfl_prb_volume_name:
   type: string
   constraints: 
     - length: { min: 3, max: 25 }
     - allowed_pattern: "vfl_prb_volume_name_[0-9]*"
   description: the volume names for vfl  probe instances
  vfl_prb_vol_size:
   type: number
   label: volume_size
   constraints:
      - range: { min: 1, max: 1000000 }
        description: Volumesize defined in gigabytes
   description: Volume size for  probes


resources:
 vfl_prb_volume_create:
  type: OS::Cinder::Volume 
  properties:
   name: { get_param: vfl_prb_volume_name } 
   size: { get_param: vfl_prb_vol_size }

Where do I need to define the outputs at base or nested?how do I define so that I can get ssomething like below

vfl_prb_3_vol_0_id: UUID
vfl_prb_4_vol_0_id: UUID

I tried something like below didn't work

outputs:
  volumes_ids:
  description: output the volume_ids all volumes created
    value:
      vfl_prb_3_vol_0_id: { get_resource: vfl_prb_3_vol_0 }