private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.vertexai.api.ToolConfig,
            com.google.cloud.vertexai.api.ToolConfig.Builder,
            com.google.cloud.vertexai.api.ToolConfigOrBuilder>
        getToolConfigFieldBuilder() {
      if (toolConfigBuilder_ == null) {
        toolConfigBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.vertexai.api.ToolConfig,
                com.google.cloud.vertexai.api.ToolConfig.Builder,
                com.google.cloud.vertexai.api.ToolConfigOrBuilder>(
                getToolConfig(), getParentForChildren(), isClean());
        toolConfig_ = null;
      }
      return toolConfigBuilder_;
    }
<pre>
Optional. Tool config. This config is shared for all tools provided in the
request.
</pre>

<code>
.google.cloud.vertexai.v1.ToolConfig tool_config = 7 [(.google.api.field_behavior) = OPTIONAL];
</code>
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/GenerateContentRequest.java