public RouteBuilder matchesParams(String paramName, Predicate<? super String> valuePredicate) {
        requireNonNull(paramName, "paramName");
        requireNonNull(valuePredicate, "valuePredicate");
        paramPredicates.add(RoutingPredicate.ofParams(paramName, valuePredicate));
        return this;
    }
Sets the {@link Route} to accept a request when the specified {@code valuePredicate} evaluates
{@code true} with the value of the specified {@code paramName} parameter.
core/src/main/java/com/linecorp/armeria/server/RouteBuilder.java