Releases the connection [open_nar()] opened, or the one a bare [geocode()] or [reverse_geocode()] call opened for itself. Safe to call when there is nothing open.
Worth calling before an import, and worth calling in a long-running process that is done with NAR. Nothing else needs it: the connection is read-only, and R releases it at the end of the session anyway.
Examples
if (FALSE) { # \dontrun{
open_nar()
close_nar()
} # }
