%out%                   Negation of %in% operator
+.twig_class            Define a method for the '+' operator for 'twig'
                        objects
calculate_icers         Calculate Incremental Cost-Effectiveness Ratios
                        (ICERs)
decisions               Add decisions to a twig
event                   Add an event layer to a twig object
payoffs                 Add payoffs to a twig object
plot_ceac               Plot Cost-Effectiveness Acceptability Curve
                        (CEAC)
prob2rate               Convert Probability to Rate
rate2prob               Convert Rate to Probability
run_twig                Run a twig model
states                  Add Markov states to a twig
twig                    Create a new twig object
