source:
  schema:
    properties:
      basic:
        indexOn: [a]
        $wild:
          indexOn: [b, red]
          ~$wilder:
            indexOn: c

  access:
    - location: /
      read: true

expected: {"rules":{".write":"false",".read":"true","basic":{".indexOn":["a"],".write":"false",".read":"true","$wild":{".indexOn":["b","red"],".write":"false",".read":"true","$wilder":{".indexOn":["c"],".write":"false",".validate":"false",".read":"true"}}}}}