0.3.0 (latest) 0.2.0 0.1.0

    public static interface Answer.CitationSourceOrBuilder extends MessageOrBuilder

## Implements

com.google.protobuf.MessageOrBuilder

## Methods

### getReferenceIndex()

    public abstract int getReferenceIndex()

Output only. Contains the index of the
Answer.AnswerReference
in the `references` repeated field.

`int32 reference_index = 1 [(.google.api.field_behavior) = OUTPUT_ONLY];`

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://docs.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html` | The referenceIndex. |