-PERL_CALLCONV HE* Perl_hv_fetch_ent(pTHX_ HV* tb, SV* key, I32 lval, U32 hash)
+/* PERL_CALLCONV HE* Perl_hv_fetch_ent(pTHX_ HV* tb, SV* key, I32 lval, U32 hash)
+ __attribute__nonnull__(pTHX_2); */
+
+PERL_CALLCONV void* Perl_hv_common(pTHX_ HV* tb, SV* keysv, const char* key, STRLEN klen, int flags, int action, SV* val, U32 hash);
+PERL_CALLCONV void* Perl_hv_common_key_len(pTHX_ HV *hv, const char *key, I32 klen_i32, const int action, SV *val, const U32 hash)