Simplify the logic of accessing codec function for specific TYPE
diff --git a/skeletons/GraphicString.h b/skeletons/GraphicString.h
index 7bc9492..3f91b50 100644
--- a/skeletons/GraphicString.h
+++ b/skeletons/GraphicString.h
@@ -15,6 +15,16 @@
 
 extern asn_TYPE_descriptor_t asn_DEF_GraphicString;
 
+#define GraphicString_free         OCTET_STRING_free
+#define GraphicString_print        OCTET_STRING_print
+#define GraphicString_constraint   asn_generic_unknown_constraint
+#define GraphicString_decode_ber   OCTET_STRING_decode_ber
+#define GraphicString_encode_der   OCTET_STRING_encode_der
+#define GraphicString_decode_xer   OCTET_STRING_decode_xer_hex
+#define GraphicString_encode_xer   OCTET_STRING_encode_xer
+#define GraphicString_decode_uper  OCTET_STRING_decode_uper
+#define GraphicString_encode_uper  OCTET_STRING_encode_uper
+
 #ifdef __cplusplus
 }
 #endif