AddFooStringer
Command
gnokey query vm/qeval -remote "https://api.gno.berty.io:443" -data "gno.land/r/tests/vm/tests_foo.AddFooStringer()"
Result
gnokey query vm/qeval -remote "https://api.gno.berty.io:443" -data "gno.land/r/tests/vm/tests_foo.AddFooStringer()"