BertCluAnnotator API for BERT-based Conversational Language Understanding. 
BertCluAnnotator.BertCluAnnotatorOptions Options for setting up a BertCluAnnotator
BertCluAnnotator.BertCluAnnotatorOptions.Builder Builder for BertCluAnnotator.BertCluAnnotatorOptions
CluRequest The input dialogue history for the BertCluAnnotator
CluResponse The output domain, intent, and slot information for the BertCluAnnotator
CluResponse.CategoricalSlot Represents a categorical slot whose values are within a finite set. 
CluResponse.Extraction A single extraction result. 
CluResponse.NonCategoricalSlot Represents a non-categorical slot whose values are open text extracted from the input text.