useEnhanced property
Set to true to use an enhanced model for speech recognition.
If use_enhanced is set to true and the model field is not set, then an
appropriate enhanced model is chosen if an enhanced model exists for the
audio. If use_enhanced is true and an enhanced version of the specified
model does not exist, then the speech is recognized using the standard
version of the specified model.
Implementation
core.bool? useEnhanced;