pub unsafe extern "C" fn Dart_StringToUTF16(
str_: Dart_Handle,
utf16_array: *mut u16,
length: *mut isize,
) -> Dart_Handlepub unsafe extern "C" fn Dart_StringToUTF16(
str_: Dart_Handle,
utf16_array: *mut u16,
length: *mut isize,
) -> Dart_Handle