private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.vertexai.api.GroundingChunk.Web,
            com.google.cloud.vertexai.api.GroundingChunk.Web.Builder,
            com.google.cloud.vertexai.api.GroundingChunk.WebOrBuilder>
        getWebFieldBuilder() {
      if (webBuilder_ == null) {
        if (!(chunkTypeCase_ == 1)) {
          chunkType_ = com.google.cloud.vertexai.api.GroundingChunk.Web.getDefaultInstance();
        }
        webBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.vertexai.api.GroundingChunk.Web,
                com.google.cloud.vertexai.api.GroundingChunk.Web.Builder,
                com.google.cloud.vertexai.api.GroundingChunk.WebOrBuilder>(
                (com.google.cloud.vertexai.api.GroundingChunk.Web) chunkType_,
                getParentForChildren(),
                isClean());
        chunkType_ = null;
      }
      chunkTypeCase_ = 1;
      onChanged();
      return webBuilder_;
    }
<pre>
Grounding chunk from the web.
</pre>

<code>.google.cloud.vertexai.v1.GroundingChunk.Web web = 1;</code>
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/GroundingChunk.java