PN_TYPE_ID        125 core/internal.c   PN_FLEX_SIZE(P->vts) = PN_TYPE_ID(PN_TUSER) + 1;
PN_TYPE_ID        136 core/potion.h  #define PN_VTABLE(t)    (PN_FLEX_AT(P->vts, PN_TYPE_ID(t)))
PN_TYPE_ID        137 core/potion.h  #define PN_TYPECHECK(t) (PN_TYPE_ID(t) >= 0 && PN_TYPE_ID(t) < PN_FLEX_SIZE(P->vts))