int optionsMask

The mask is created by shifting 1 by the index of the specific PerformanceOverlayOption to enable.

Source 

int get optionsMask => _optionsMask;
void optionsMask=(int mask)

Source 

set optionsMask(int mask) {
  assert(mask != null);
  if (mask == _optionsMask)
    return;
  _optionsMask = mask;
  markNeedsPaint();
}