pub unsafe extern "C" fn Dart_StringToUTF8(
str_: Dart_Handle,
utf8_array: *mut *mut u8,
length: *mut isize,
) -> Dart_Handlepub unsafe extern "C" fn Dart_StringToUTF8(
str_: Dart_Handle,
utf8_array: *mut *mut u8,
length: *mut isize,
) -> Dart_Handle