stansim_simulation: Construct an S3 object of type stansim_simulation
In rstansim: Simulation Studies with Stan

A constructor function for creating S3 objects of class stansim_simulation. stansim_simulation objects are the basic unit of output from calls to the fit_models() function and collects the specified data for all stan models fitted.

1 2	stansim_simulation(sim_name, stansim_uni_list, start_time, end_time, raw_call, seed)

`sim_name`	The name to be given to the simulation represented by the `stansim_simulation` object.
`stansim_uni_list`	A list of objects with S3 class `stan_sim_uni`. This is an unexported class used to store the outcomes of individual simulation runs internal to the `fit_models()` function.
`start_time`	System time when `fit_models()` was called.
`end_time`	System time when the results from `fit_models()` were returned.
`raw_call`	The values of all arguments provided to `fit_models()` when first ran. This is used for any refitting of datasets using the `refit()` method.
`seed`	The global seed for the `fit_models()` call.