Wrapper for a native TensorFlow Lite Delegate.
WARNING: This is an experimental interface that is subject to change.
If a delegate implementation holds additional resources or memory that should be explicitly
freed, then best practice is to add a
close() method to the implementation and have the
client call that explicitly when the delegate instance is no longer in use. While this approach
technically allows sharing of a single delegate instance across multiple interpreter instances,
the delegate implementation must explicitly support this.
Returns a native handle to the TensorFlow Lite delegate implementation.