setProperty method
Set additional properties. https://github.com/wang-bin/mdk-sdk/wiki/Player-APIs#void-setpropertyconst-stdstring-key-const-stdstring-value
Implementation
void setProperty(String name, String value) {
final ck = name.toNativeUtf8();
final cv = value.toNativeUtf8();
_player.ref.setProperty.asFunction<
void Function(Pointer<mdkPlayer>, Pointer<Char>, Pointer<Char>)>()(
_player.ref.object, ck.cast(), cv.cast());
malloc.free(ck);
malloc.free(cv);
}