@SmithyInternalApi
    public static boolean hasBuiltIn(String name) {
        return LazyEndpointComponentFactoryHolder.INSTANCE.hasBuiltIn(name);
    }
Returns true if a built-in of the provided name has been registered.

@param name the name of the built-in to check for.
@return true if the built-in is present, false otherwise.
smithy-rules-engine/src/main/java/software/amazon/smithy/rulesengine/language/EndpointRuleSet.java