add example for hero *sessions.Session dependency which is used on an index route outside of the main package, it is as easy as it shown. Added mostly after the issue: https://github.com/kataras/iris/issues/1057 -- have fun

Former-commit-id: 93338d0e03d6be885edf783c09a2c181568e9ec5

_examples/hero/sessions/main.go

@@ -0,0 +1,40 @@
+package main
+
+import (
+	"time"
+
+	"github.com/kataras/iris/_examples/hero/sessions/routes"
+
+	"github.com/kataras/iris"
+	"github.com/kataras/iris/hero" // <- IMPORTANT
+	"github.com/kataras/iris/sessions"
+)
+
+func main() {
+	app := iris.New()
+	sessionManager := sessions.New(sessions.Config{
+		Cookie:       "site_session_id",
+		Expires:      60 * time.Minute,
+		AllowReclaim: true,
+	})
+
+	// Register
+	// dynamic dependencies like the *sessions.Session, from `sessionManager.Start(ctx) *sessions.Session` <- it accepts a Context and it returns
+	// something -> this is called dynamic request-time dependency and that "something" can be used to your handlers as input parameters,
+	// no limit about the number of dependencies, each handler will be builded once, before the server ran and it will use only dependencies that it needs.
+	hero.Register(sessionManager.Start)
+	// convert any function to an iris Handler, their input parameters are being resolved using the unique Iris' blazing-fast dependency injection
+	// for services or dynamic dependencies like the *sessions.Session, from sessionManager.Start(ctx) *sessions.Session) <- it accepts a context and it returns
+	// something-> this is called dynamic request-time dependency.
+	indexHandler := hero.Handler(routes.Index)
+
+	// Method: GET
+	// Path: http://localhost:8080
+	app.Get("/", indexHandler)
+
+	app.Run(
+		iris.Addr(":8080"),
+		iris.WithoutVersionChecker,
+		iris.WithoutServerError(iris.ErrServerClosed),
+	)
+}