__attribute__nonnull__(pTHX_1); */
#ifdef USE_ITHREADS
+PERL_CALLCONV struct refcounted_he * Perl_refcounted_he_copy(pTHX_ const struct refcounted_he *he);
PERL_CALLCONV struct refcounted_he * Perl_refcounted_he_dup(pTHX_ const struct refcounted_he *const he, CLONE_PARAMS* param)
__attribute__nonnull__(pTHX_2);