entityTypes property
The entity types in the labeled training data that Amazon Comprehend uses to train the custom entity recognizer. Any entity types that you don't specify are ignored.
A maximum of 25 entity types can be used at one time to train an entity recognizer. Entity types must not contain the following invalid characters: \n (line break), \n (escaped line break), \r (carriage return), \r (escaped carriage return), \t (tab), \t (escaped tab), space, and , (comma).
Implementation
final List<EntityTypesListItem> entityTypes;