The standard library int_red_black_map package implements key to value mappings via the red-black trees, the standard library workhorse.
The unt_red_black_map package implements the Map api.
The unt_red_black_map package source code is in src/lib/src/unt-red-black-map.pkg.
See also: int_red_black_map.
The above information is manually maintained and may contain errors.
Map?