/** Method that calculates bit set (flags) of all features that are enabled by default. */
 public static int collectDefaults() {
   int flags = 0;
   for (Feature f : values()) {
     if (f.enabledByDefault()) {
       flags |= f.getMask();
     }
   }
   return flags;
 }
 public CsvGenerator disable(Feature f) {
   _formatFeatures &= ~f.getMask();
   _writer.overrideFormatFeatures(_formatFeatures);
   return this;
 }
 public final boolean isEnabled(Feature f) {
   return (_formatFeatures & f.getMask()) != 0;
 }