pub unsafe extern "C" fn jsc_value_new_promise(
context: *mut JSCContext,
executor: JSCExecutor,
user_data: gpointer,
) -> *mut JSCValueAvailable on crate feature
v2_48 only.pub unsafe extern "C" fn jsc_value_new_promise(
context: *mut JSCContext,
executor: JSCExecutor,
user_data: gpointer,
) -> *mut JSCValuev2_48 only.