gets the context type

(registry-get :null) => (contains-in {:context :null, :rt {:default {:key :default, :resource :hara/context.rt.null, :config {}}}})

installs a new context type

(registry-install :play.test)

lists all contexts

(registry-list)

gets the runtime type information

installs a context runtime type

return all runtime types

(registry-rt-list)

uninstalls a context runtime type

gets the scratch runtime for a registered context

sets the scratch runtime for a registered context

uninstalls a new context type

(registry-uninstall :play.test)

checks that object is of type NullRuntime