error: JNI method 'Buf.get' returns 's8', which isn't supported by the JNI call-method lowering yet — only void/bool/s32/s64/f32/f64 and pointers are wired up
  --> /Users/agra/projects/sx/examples/1410-ffi-jni-call-11-unsupported-return-diag.sx:24:14
   |
24 |         _ := b.get();
   |              ^^^^^