docs: function Hash (validator, serializer, factory) {
    const size = HASH_LENGTH
    const name = 'Hash'
  
    validator = validator.bind(null, name, size)
    serializer = serializer(validator)
  
    const hasher = function (value) {
      return validator(value) && value
    }
  
    return Object.defineProperty(factory(serializer, size, name),
      'hash',
      {
        value: hasher
      })
  }