.get_if_args_are_missing
                        Determines which arguments for a function,
                        which is its caller by default.
U_halt                  A univariate halting test using the Wilcoxon
                        test, which must be satisfied for all condition
                        pairs.
ad_halt                 A univariate halting test using the
                        Anderson-Darling test.
calc_metrics            Calculates basic metrics about ldamatch search
                        result.
calc_p_value            Calculates p-value using specified halting
                        test.
compare_ldamatch_outputs
                        Compares outputs of ldamatch runs.
create_halting_test     Creates halting test from multiple tests.
estimate_exhaustive     Estimates the maximum number of cases to be
                        checked during exhaustive search.
f_halt                  A univariate halting test using Fisher's exact
                        test.
get_param               Gets value for ldamatch global parameter.
ks_halt                 A univariate halting test using the
                        Kolmogorov-Smirnov Test, which must be
                        satisfied for all condition pairs.
l_halt                  A univariate halting test using Levene's test.
match_groups            Creates a matched group via backward selection.
matching_methods        The available methods for matching.
nondeterministic_matching_methods
                        The available nondeterministic methods for
                        matching.
parallelized_matching_methods
                        The available parallelized methods for
                        matching.
search_exhaustive       Searches the space backwards, prefering more
                        subjects and certain group size proportions.
search_heuristic2       OBSOLETE: Finds matching using depth-first
                        search recursively.
search_heuristic3       Finds matching using depth-first search,
                        looking ahead n steps.
search_heuristic4       Finds matching using depth-first search,
                        looking ahead n steps.
search_random           Searches by randomly selecting subspaces with
                        decreasing expected size.
set_param               Sets value for ldamatch global parameter.
t_halt                  A univariate halting test using the t-test,
                        which must be satisfied for all condition
                        pairs.
wilks_halt              A multivariate halting test appropriate for
                        more than two condition levels.
