func (f HandlerFuncC) ServeHTTPC(ctx context.Context, w http.ResponseWriter, r *http.Request) {
	f(ctx, w, r)
}
ServeHTTPC calls f(ctx, w, r).
package xhandler  
import (
	"net/http"
	"golang.org/x/net/context"
)
type HandlerC interface {
	ServeHTTPC(context.Context, http.ResponseWriter, *http.Request)
}
type HandlerFuncC func(context.Context, http.ResponseWriter, *http.Request)