/**
  * Method for disabling specified generator feature (check {@link SmileGenerator.Feature} for list
  * of features)
  */
 public SmileFactory disable(SmileGenerator.Feature f) {
   _smileGeneratorFeatures &= ~f.getMask();
   return this;
 }
 /** Check whether specified generator feature is enabled. */
 public final boolean isEnabled(SmileGenerator.Feature f) {
   return (_smileGeneratorFeatures & f.getMask()) != 0;
 }
 /**
  * Method for enabling specified generator features (check {@link SmileGenerator.Feature} for list
  * of features)
  */
 public SmileFactory enable(SmileGenerator.Feature f) {
   _smileGeneratorFeatures |= f.getMask();
   return this;
 }