accept

Maps this instance's current variant to a value of type [T] using the given [visitor]. Note that this method is not forwards compatible with new variants from the API, unless [visitor] overrides [Visitor.unknown]. To handle variants not known to this version of the SDK gracefully, consider overriding [Visitor.unknown]:

import com.langchain.smith.core.JsonValue;
import java.util.Optional;
Optional result = runStatsResponse.accept(new RunStatsResponse.Visitor>() {
    @Override
    public Optional visitRunStats(RunStats runStats) {
        return Optional.of(runStats.toString());
    }
    // ...
    @Override
    public Optional unknown(JsonValue json) {
        // Or inspect the `json`.
        return Optional.empty();
    }
});

• Throws LangChainInvalidDataException: if [Visitor.unknown] is not overridden in [visitor] and the current variant is unknown.