subject: Custom types in JS-YAML
spaces:
- !space
  height: 1000
  width: 1000
  points:
  - !point [ 10, 43, 23 ]
  - !point [ 165, 0, 50 ]
  - !point [ 100, 100, 100 ]

- !space
  height: 64
  width: 128
  points:
  - !point [ 12, 43, 0 ]
  - !point [ 1, 4, 90 ]

- !space {} # An empty space