So that packages can ship multiple plumber routers, users should store their Plumber APIs
in the inst subfolder plumber (./inst/plumber/API_1/plumber.R).
plumb_api(package = NULL, name = NULL)available_apis(package = NULL)
Package to inspect
Name of the package folder to plumb().
A Plumber object. If either package or name is null, the appropriate available_apis() will be returned.
To view all available Plumber APIs across all packages, please call available_apis().
A package value may be provided to only display a particular package's Plumber APIs.