It seems to be impossible to specify command arguments to echo-dmr command beginning with double-dash.

While e.g. this works:
[domain@localhost:9999 /] echo-dmr undeploy deployment0.war
{
"operation" => "composite",
"address" => [],
"steps" => [

{ "operation" => "remove", "address" => [("deployment" => "deployment0.war")] }

]
}

This does not:
[domain@localhost:9999 /] echo-dmr deploy /home/dpospisi/deploy/deployment1.war --all-server-groups
Unrecognized arguments: [--all-server-groups]

Putting requested command in quotes does not work as well.