public com.google.cloud.tasks.v2beta3.HttpTarget.HeaderOrBuilder getHeaderOrBuilder() {
        if (headerBuilder_ != null) {
          return headerBuilder_.getMessageOrBuilder();
        } else {
          return header_ == null
              ? com.google.cloud.tasks.v2beta3.HttpTarget.Header.getDefaultInstance()
              : header_;
        }
      }
<pre>
header embodying a key and a value.
</pre>

<code>.google.cloud.tasks.v2beta3.HttpTarget.Header header = 1;</code>
java-tasks/proto-google-cloud-tasks-v2beta3/src/main/java/com/google/cloud/tasks/v2beta3/HttpTarget.java