tanu@LAPTOP ~/tmp> cat test.vala
void main() {
        var h = new GLib.HashTable<string, string>(GLib.str_hash, GLib.str_equal);

        if ("foo" in h)
                GLib.message("found");
        else
                GLib.message("no!");
}



tanu@LAPTOP ~/tmp> valac test.vala
test.vala:4.13-4.22: error: `GLib.HashTable<string,string>' does not have a `contains' method
        if ("foo" in h)
            ^^^^^^^^^^
Compilation failed: 1 error(s), 0 warning(s)