Set an option only if it does not exist yet.
Examples
init_option("dummy_option", 2)
init_option("dummy_option", 5)
getOption("dummy_option") # still 2
#> [1] 2
Set an option only if it does not exist yet.
init_option("dummy_option", 2)
init_option("dummy_option", 5)
getOption("dummy_option") # still 2
#> [1] 2