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 @ b47a0697080cf89f9ae9e31831d94dae31c8ad55

gremlin b47a069708 More images		%!s(int64=4) %!d(string=hai) anos
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static	b47a069708 More images	%!s(int64=4) %!d(string=hai) anos
templates	ee093441ad Non img	%!s(int64=4) %!d(string=hai) anos
application.properties	a3a59d43e2 Initial Command+Message->dispatcher->response implementation	%!s(int64=4) %!d(string=hai) anos