public Builder clearHttpRequest() {
      if (httpRequestBuilder_ == null) {
        if (messageTypeCase_ == 3) {
          messageTypeCase_ = 0;
          messageType_ = null;
          onChanged();
        }
      } else {
        if (messageTypeCase_ == 3) {
          messageTypeCase_ = 0;
          messageType_ = null;
        }
        httpRequestBuilder_.clear();
      }
      return this;
    }
<pre>
HTTP request that is sent to the worker.

An HTTP task is a task that has
[HttpRequest][google.cloud.tasks.v2.HttpRequest] set.
</pre>

<code>.google.cloud.tasks.v2.HttpRequest http_request = 3;</code>
java-tasks/proto-google-cloud-tasks-v2/src/main/java/com/google/cloud/tasks/v2/Task.java