Returns the mizer_info_level option if it is set and fallback
otherwise. This is the default of the info_level argument of the functions
that report information, so that
options(mizer_info_level = 0) quietens mizer as a whole, including the
functions that have no info_level argument of their own, such as
species_params<-() and the rate setters.
Details
Extension packages should use this as the default of their own info_level
argument, so that a constructor or setter of theirs follows the option like
mizer's own do:
newFooParams <- function(species_params, ...,
info_level = default_info_level()) {
newMultispeciesParams(species_params, info_level = info_level, ...)
}Take the argument explicitly like that rather than hard-coding a value in the
call, which would make a user's own info_level collide with it.
