1. A method of access control of a field of a record in computer memory of a computing system, the computer memory of the computing system comprising a plurality of disparate memory types, the method comprising: defining, by an application, a record, the record comprising one or more fields, the one or more fields including a restricted field having a specification of restricted accessibility when the restricted field is allocated in a particular memory type; allocating, by the application, an instance of the record in memory of the particular memory type; and while the record is allocated in the particular memory type, denying, by the application, each attempted access of the restricted field.