Resolve options(log_message.verbose).
An explicit verbose argument wins. Otherwise the option is used, and the
default is TRUE.
Examples
get_verbose()
#> [1] TRUE
get_verbose(verbose = FALSE)
#> [1] FALSE
get_verbose(verbose = TRUE)
#> [1] TRUE
options(log_message.verbose = FALSE)
get_verbose()
#> [1] FALSE
get_verbose(verbose = TRUE)
#> [1] TRUE
options(log_message.verbose = TRUE)
get_verbose()
#> [1] TRUE
options(log_message.verbose = NULL)