| create_metamodelBuiltin | Run 'modelBuilderUI()' and create resulting metamodel | 
| create_metamodelTextual | Send metamodel to 'modelTextualUI()' and run shiny application | 
| estimatesUI | Shiny GUI to examine the model and evaluate estimates for fixed effects. | 
| modelBuilderUI | Build RsNLME model from Shiny GUI and generate corresponding RsNLME code | 
| modelTextualUI | Edit textual RsNLME model from Shiny GUI |