Check that a decision-analytic model function is of the appropriate form. Detect if it returns net benefit or CEA format note check_outputs adds a class
check_model_fn(
model_fn,
par_fn,
mfargs = NULL,
outputs = NULL,
verbose = FALSE
)A modified copy of model_fn with a class attribute indicating whether it is
in net benefit "nb" or cost-effectiveness "cea" format, and an attribute "nopt" giving the
number of decision options.