Separated Group from Echo to limit API

Signed-off-by: Vishal Rana <vr@labstack.com>

echo.go

@@ -175,18 +175,6 @@ func New() (e *Echo) {
 	return
 }
 
-// Group creates a new sub router with prefix. It inherits all properties from
-// the parent. Passing middleware overrides parent middleware.
-func (e *Echo) Group(pfx string, m ...Middleware) *Echo {
-	g := *e
-	g.prefix = g.prefix + pfx
-	if len(m) > 0 {
-		g.middleware = nil
-		g.Use(m...)
-	}
-	return &g
-}
-
 // Router returns router.
 func (e *Echo) Router() *Router {
 	return e.router
@@ -355,6 +343,18 @@ func (e *Echo) URL(h Handler, params ...interface{}) string {
 	return e.URI(h, params...)
 }
 
+// Group creates a new sub router with prefix. It inherits all properties from
+// the parent. Passing middleware overrides parent middleware.
+func (e *Echo) Group(prefix string, m ...Middleware) *Group {
+	g := &Group{*e}
+	g.echo.prefix += prefix
+	if len(m) > 0 {
+		g.echo.middleware = nil
+		g.Use(m...)
+	}
+	return g
+}
+
 func (e *Echo) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	c := e.pool.Get().(*Context)
 	h, echo := e.router.Find(r.Method, r.URL.Path, c)

group.go

@@ -2,6 +2,56 @@ package echo
 
 type (
 	Group struct {
-		*Echo
+		echo Echo
 	}
 )
+
+func (g *Group) Use(m ...Middleware) {
+	for _, h := range m {
+		g.echo.middleware = append(g.echo.middleware, wrapMiddleware(h))
+	}
+}
+
+func (g *Group) Connect(path string, h Handler) {
+	g.echo.Connect(path, h)
+}
+
+func (g *Group) Delete(path string, h Handler) {
+	g.echo.Delete(path, h)
+}
+
+func (g *Group) Get(path string, h Handler) {
+	g.echo.Get(path, h)
+}
+
+func (g *Group) Head(path string, h Handler) {
+	g.echo.Head(path, h)
+}
+
+func (g *Group) Options(path string, h Handler) {
+	g.echo.Options(path, h)
+}
+
+func (g *Group) Patch(path string, h Handler) {
+	g.echo.Patch(path, h)
+}
+
+func (g *Group) Post(path string, h Handler) {
+	g.echo.Post(path, h)
+}
+
+func (g *Group) Put(path string, h Handler) {
+	g.echo.Put(path, h)
+}
+
+func (g *Group) Trace(path string, h Handler) {
+	g.echo.Trace(path, h)
+}
+
+func (g *Group) WebSocket(path string, h HandlerFunc) {
+	g.echo.WebSocket(path, h)
+}
+
+func (g *Group) Group(prefix string, m ...Middleware) *Group {
+	return g.echo.Group(prefix, m...)
+}