getInt method
Implementation
int getInt(String key, [int defaultValue = -1]) {
final ckey = key.toNativeUtf8().cast<ffi.Char>();
final crval = calloc<ffi.Int>();
cfeatures2d.cv_flann_IndexParams_getInt(ref, ckey, defaultValue, crval);
calloc.free(ckey);
final rval = crval.value;
calloc.free(crval);
return rval;
}