AddFooStringer
Command
gnokey query vm/qeval -remote "https://rpc.test11.testnets.gno.land" -data "gno.land/r/tests/vm/tests_foo.AddFooStringer()"
Result
gnokey query vm/qeval -remote "https://rpc.test11.testnets.gno.land" -data "gno.land/r/tests/vm/tests_foo.AddFooStringer()"