invertString

Returns a new map with keys and values swapped. If multiple entries have the same value, later entries overwrite earlier ones in the result unless conflict resolver is provided.

Example:

    var map = new HashMap<string, string> (GLib.str_hash, GLib.str_equal);
    map.put ("a", "1");
    map.put ("b", "2");
    var inv = Maps.invertString (map);
    // inv["1"] == "a", inv["2"] == "b"

Parameters:

map	the source map.
on_conflict	optional resolver for value-key collisions.

Returns:

a new HashMap with keys and values swapped.