ID | ... | Foto
----------------------
1  | ... | Foto1.jpg
...| ... | ...
25 | ... | Foto25.jpg

source:
  plugin: spreadsheet
  file: modules/custom/zedelgem_migrations/assets/xlsx/gebruikers_zedelgem_intranet.xlsx
  worksheet: 'Gebruikers'
  origin: A2
  header_row: 1
  columns:
    - ID
    - 'Foto'
    - 'Voornaam'
    - 'Achternaam'
  constants:
    file_source_uri: modules/custom/zedelgem_migrations/assets/images/_smoelenboek
  keys:
    ID:
      type: integer
      size: big
process:
  # Media bundle.
  bundle:
    plugin: default_value
    default_value: image
  uri:
      plugin: concat
      delimiter: /
      source:
        - constants/file_source_uri
        - 'Foto'
  name: 'Foto'
  uid: ID
  field_image/alt:
    concat:
    source:
      - 'Voornaam'
      - 'Achternaam'
  field_image/title:
    concat:
    source:
      - 'Voornaam'
      - 'Achternaam'
  field_image/target_id: 'Foto'
destination:
  plugin: entity: media
  default_bundle: image