public Builder setTitle(java.lang.String value) {
        if (value == null) {
          throw new NullPointerException();
        }
        title_ = value;
        bitField0_ |= 0x00000002;
        onChanged();
        return this;
      }
<pre>
Title of the attribution.
</pre>

<code>optional string title = 2;</code>

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