gremlin/lti-demo-cmr: lti-demo is predominantly builder based ... api->actionbuilder->build->response there is another approach which is message-response pattern and this lti tool demo project does that. api->messagebuilder->dispatch->response @ a3a59d43e23d06fc335daf3db68d96e59723b6e3

gremlin a3a59d43e2 Initial Command+Message->dispatcher->response implementation		%!s(int64=4) %!d(string=hai) anos
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java	a3a59d43e2 Initial Command+Message->dispatcher->response implementation	%!s(int64=4) %!d(string=hai) anos
resources	a3a59d43e2 Initial Command+Message->dispatcher->response implementation	%!s(int64=4) %!d(string=hai) anos