source:
  functions:
    - isEmail(emailp): root.users.private[auth.uid].email.val().replace('.','') == emailp
  schema:
    constraint: isEmail('yo')
  access:
    - location: /
      write: true

expected: {"rules":{".write":"((root.child('users').child('private').child(auth.uid).child('email').val().replace('.','')=='yo'))",".read":"false"}}