checkStatisticalModel.RdcheckStatisticalModel asserts if object is an existing fit from a
model functions such as lm, glm and many others. Containing MiDAS object as
its data atribute.
checkStatisticalModel(object)An existing fit from a model function such as lm, glm and many others.
Logical indicating if object is an existing fit from a
model functions such as lm, glm and many others. Containing MiDAS object as
its data attribute. Otherwise raise an error.