Symbol: lua_isnumber
usr/src/uts/common/fs/zfs/lua/lua.h
160
LUA_API int (lua_isnumber) (lua_State *L, int idx);
usr/src/uts/common/fs/zfs/zcp.c
1351
if (lua_isnumber(state, -2) && lua_tointeger(state, -2) > 0) {