Restructure analysis results + add visit variable to pool data.frame

NAMESPACE

@@ -1,5 +1,6 @@
 # Generated by roxygen2: do not edit by hand
 
+S3method(as.data.frame,analysis)
 S3method(as.data.frame,pool)
 S3method(draws,approxbayes)
 S3method(draws,bayes)
@@ -37,19 +38,22 @@ S3method(validate,stan_data)
 export(Stack)
 export(add_class)
 export(analyse)
+export(analysis_result)
 export(ancova)
 export(as_class)
 export(as_vcov)
 export(delta_template)
 export(draws)
 export(expand)
 export(expand_locf)
+export(extract_analysis_result)
 export(extract_imputed_dfs)
 export(fill_locf)
 export(getStrategies)
 export(get_example_data)
 export(has_class)
 export(impute)
+export(is.analysis_result)
 export(locf)
 export(longDataConstructor)
 export(method_approxbayes)
@@ -72,6 +76,7 @@ import(R6)
 import(Rcpp)
 import(methods)
 importFrom(assertthat,assert_that)
+importFrom(assertthat,has_attr)
 importFrom(mmrm,VarCorr)
 importFrom(rstan,extract)
 importFrom(rstan,sampling)