string rowBack = "\", \"metadata\":";
for (int i = 0; i < numBins-1; i++) {
if (m->control_pressed) { out.close(); return 0; }
string rowBack = "\", \"metadata\":";
for (int i = 0; i < numBins-1; i++) {
if (m->control_pressed) { out.close(); return 0; }