Optionalconfig: {OptionaldefaultTarget?: stringThe route (typically in another plugin) that this should map to by default.
The string is expected to be on the standard <plugin id>.<route id> form,
for example techdocs.docRoot.
Optional Readonlyparams?: string extends TParamKeys ? (keyof TParams)[] : TParamKeys[]The parameters that will be provided to the external route reference.
Creates a route descriptor, to be later bound to a concrete route by the app. Used to implement cross-plugin route references.