Apd |void |sv_setsv_mg |SV *dstr|SV *sstr
Apd |void |sv_usepvn_mg |SV *sv|char *ptr|STRLEN len
Ap |MGVTBL*|get_vtbl |int vtbl_id
-p |char* |pv_display |SV *dsv|char *pv|STRLEN cur|STRLEN len \
+Ap |char* |pv_display |SV *dsv|char *pv|STRLEN cur|STRLEN len \
|STRLEN pvlim
Afp |void |dump_indent |I32 level|PerlIO *file|const char* pat|...
Ap |void |dump_vindent |I32 level|PerlIO *file|const char* pat \