pub unsafe extern "C" fn Dart_StringGetProperties(
str_: Dart_Handle,
char_size: *mut isize,
str_len: *mut isize,
peer: *mut *mut c_void,
) -> Dart_Handlepub unsafe extern "C" fn Dart_StringGetProperties(
str_: Dart_Handle,
char_size: *mut isize,
str_len: *mut isize,
peer: *mut *mut c_void,
) -> Dart_Handle