DBUG API: mark overlapped routes, hide the builtin functionality (read description)

also reference the correct file:line on <autogenerated> (by searching for the file,line of method inside the embedded fields themselves, as go automatically generates the methods foreach struct for their embedded fields)

fix UseGlobal may override the overlap feature

core/router/api_builder.go

@@ -178,9 +178,8 @@ func overlapRoute(r *Route, next *Route) {
 		ctx.Do(nextHandlers)
 	}
 
-	// NOTE(@kataras): Any UseGlobal call will prepend to this, if they are
-	// in the same Party then it's expected, otherwise not.
-	r.beginHandlers = append(context.Handlers{decisionHandler}, r.beginHandlers...)
+	r.builtinBeginHandlers = append(context.Handlers{decisionHandler}, r.builtinBeginHandlers...)
+	r.overlappedLink = next
 }
 
 // APIBuilder the visible API for constructing the router
@@ -411,7 +410,7 @@ func (api *APIBuilder) handle(errorCode int, method string, relativePath string,
 	var err error
 	for _, route = range routes {
 		if route == nil {
-			break
+			continue
 		}
 
 		// global