diff --git a/encoding/encoding.go b/encoding/encoding.go
index f9defe6..3ecdc33 100644
--- a/encoding/encoding.go
+++ b/encoding/encoding.go
@@ -1,6 +1,7 @@
 package encoding
 
 import (
+	"fmt"
 	"strings"
 )
 
@@ -38,5 +39,6 @@ func RegisterCodec(codec Codec) {
 //
 // The content-subtype is expected to be lowercase.
 func GetCodec(contentSubtype string) Codec {
+	fmt.Println("xx", contentSubtype)
 	return registeredCodecs[contentSubtype]
 }