factory constructor ManagedDataModelException.invalidEntityUniqueProperty

Source

factory ManagedDataModelException.invalidEntityUniqueProperty(
    ManagedEntity entity, Symbol property) {
  return new ManagedDataModelException("Type '${_getPersistentClassName(entity)}' "
      "declares '${MirrorSystem.getName(property)}' as unique in 'ManagedTableAttributes', "
      "but '${MirrorSystem.getName(property)}' is not a property of this type.");
}