forEach

Applies the given function to each key-value pair in the map.

Example:

    var map = new HashMap<string,string> (GLib.str_hash, GLib.str_equal);
    map.put ("a", "1");
    map.forEach ((k, v) => {
        print ("%s=%s\n", k, v);
    });

Parameters:

func	the function to apply to each entry.