Variant of CommonRouteDefinition that narrows the type of customProps to the supplied
CustomProps generic and requires its presence. Use this from wrapper signatures that want to
require callers to specify a particular customProps shape on every method or route.
Variant of CommonRouteDefinition that narrows the type of
customPropsto the suppliedCustomPropsgeneric and requires its presence. Use this from wrapper signatures that want to require callers to specify a particularcustomPropsshape on every method or route.