edaxBookShow method
Show book.
Probably, you should use edaxGetBookMoveWithPosition().
See: https://github.com/sensuikan1973/libedax4dart/issues/46
Implementation
Position edaxBookShow() {
final dstP = calloc<bindings.Position>();
_bindings.edax_book_show(dstP);
final position = Position.fromCStruct(dstP.ref);
calloc.free(dstP);
return position;
}