builtin_s2a_si_opti0_thunk  622 core/builtin.h extern AvmBox builtin_s2a_si_opti0_thunk(AvmMethodEnv env, uint32_t argc, AvmBox* argv);
builtin_s2a_si_opti0_thunk  623 core/builtin.h #define String_private__charAt_thunk  builtin_s2a_si_opti0_thunk