Class DS.InternalModel
Module:
ember-data
InternalModel is the Model class that we use internally inside Ember Data to represent models.
Internal ED methods should only deal with InternalModel objects. It is a fast, plain Javascript class.
We expose DS.Model to application code, by materializing a DS.Model from InternalModel lazily, as
a performance optimization.
InternalModel should never be exposed to application code. At the boundaries of the system, in places
like find, push, etc. we convert between Models and InternalModels.
We need to make sure that the properties from InternalModel are correctly exposed/proxied on Model
if they are needed.