private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.tasks.v2beta2.HttpRequest,
            com.google.cloud.tasks.v2beta2.HttpRequest.Builder,
            com.google.cloud.tasks.v2beta2.HttpRequestOrBuilder>
        getHttpRequestFieldBuilder() {
      if (httpRequestBuilder_ == null) {
        if (!(payloadTypeCase_ == 13)) {
          payloadType_ = com.google.cloud.tasks.v2beta2.HttpRequest.getDefaultInstance();
        }
        httpRequestBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.tasks.v2beta2.HttpRequest,
                com.google.cloud.tasks.v2beta2.HttpRequest.Builder,
                com.google.cloud.tasks.v2beta2.HttpRequestOrBuilder>(
                (com.google.cloud.tasks.v2beta2.HttpRequest) payloadType_,
                getParentForChildren(),
                isClean());
        payloadType_ = null;
      }
      payloadTypeCase_ = 13;
      onChanged();
      return httpRequestBuilder_;
    }
<pre>
HTTP request that is sent to the task's target.

An HTTP task is a task that has
[HttpRequest][google.cloud.tasks.v2beta2.HttpRequest] set.
</pre>

<code>.google.cloud.tasks.v2beta2.HttpRequest http_request = 13;</code>
java-tasks/proto-google-cloud-tasks-v2beta2/src/main/java/com/google/cloud/tasks/v2beta2/Task.java