public Builder clearUri() {
        uri_ = getDefaultInstance().getUri();
        bitField0_ = (bitField0_ & ~0x00000001);
        onChanged();
        return this;
      }
<pre>
URI reference of the chunk.
</pre>

<code>optional string uri = 1;</code>

@return This builder for chaining.
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/GroundingChunk.java