Instanciate common attributes everywhere so one can simply use the extend method

commonAttributes.go

@@ -13,7 +13,7 @@ type CommonAttributes struct {
 
 // NewCommonAttributes creates a new set of CommonAttributes. It returns a
 // *CommonAttributes.
-func NewCommonAttributes() *CommonAttributes {
+func newCommonAttributes() *CommonAttributes {
 	return new(CommonAttributes)
 }