Type hierarchy

The type hierarchy is implemented in "src/types.jl".

AbstractSem: the most abstract type in our package

• AbstractSemSingle{O, I, L, D} <: AbstractSem is an abstract parametric type that is a supertype of all single models
  • Sem: models that do not need automatic differentiation or finite difference approximation
  • SemFiniteDiff: models whose gradients and/or hessians should be computed via finite difference approximation
• AbstractSemCollection <: AbstractSem is an abstract supertype of all models that contain multiple AbstractSem submodels

Every AbstractSemSingle has to have SemObserved, SemImply, SemLoss and SemOptimizer fields (and can have additional fields).

SemLoss is a container for multiple SemLossFunctions.