@java.lang.Override
  public com.google.cloud.vertexai.api.TokensInfo getDefaultInstanceForType() {
    return DEFAULT_INSTANCE;
  }
<pre>
Optional. Optional fields for the role from the corresponding Content.
</pre>

<code>string role = 3 [(.google.api.field_behavior) = OPTIONAL];</code>

@param value The bytes for role to set.
@return This builder for chaining.
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/TokensInfo.java