def addModel(self, moduleName, modelName, model):
modelIdentifier = "<STR_LIT>".format(moduleName, modelName)<EOL>if modelIdentifier not in self._models:<EOL><INDENT>self._models[modelIdentifier] = model<EOL><DEDENT>else:<EOL><INDENT>message = "<STR_LIT>""<STR_LIT>".format(modelIdentifier)<EOL>raise Exception(message)<EOL><DEDENT>
Add a model instance to the application model pool.

:param moduleName: <str> module name in which the model is located
:param modelName: <str> model name
:param model: <object> model instance
:return: <void>