Autogenerated parts of the model
    - magnetism on each of the sld parameters
    - vector parameters
    - tied parameters
    - linearize for loop
    - need an easy way to reparameterize an existing model
    - can't currently reference other models from within one model
    - autogenerate figures for docs from  demo parameters (or maybe default)

Existing models
    - fix problems with specific models (see tickets)
    - clean up model code (e.g., use J1c, sinc, etc.)
    - move from NR J1

Integration
     - slowly evolve the sasview model api
     - preserve parameter order using ordered dict, with removing sort in GUI
     - redo interface to resolution within sasview GUI so that it doesn't recalc q every time
     - show min max in gui
     

Parameter enhancements
    - display ER and VR when available
    - access to effective radius in constraints
    - don't use automatic constraint to set effective radius in product model
    - *enhancement* allow model to define the derived parameters (possibly polydisperse)
    - allow parameters not part of existing models for use in constraints (e.g., by having a zero model with k parameters)


GUI aspects
    - show components separately for product and sum models
    - weighted sum of several models (mixture models) to avoid e.g., p1_p2_radius
    - can we do mixture models "on the fly"

Fitting Enhancements
    - integer parameters not fit properly
    - deweighting SAXS fits
    - downsampling SAXS data
    - assign cost to structure in the residuals
    - mask of middle part of data (e. g., spurions)