Optional MultiMatch dependencies are checked explicitly. Density and the built-in elastic-consensus reference implementation have no optional dependency.
Examples
spec <- gaze_baseline_spec(screen = gaze_screen(20, 10, unit = "deg"),
density_sigmas = c(1, 2))
gaze_baseline_availability(spec)
#> method available reason
#> 1 multimatch TRUE <NA>
#> 2 density TRUE <NA>
#> 3 elastic TRUE <NA>