@java.lang.Override
  public int hashCode() {
    if (memoizedHashCode != 0) {
      return memoizedHashCode;
    }
    int hash = 41;
    hash = (19 * hash) + getDescriptor().hashCode();
    if (!internalGetHeaders().getMap().isEmpty()) {
      hash = (37 * hash) + HEADERS_FIELD_NUMBER;
      hash = (53 * hash) + internalGetHeaders().hashCode();
    }
    hash = (29 * hash) + getUnknownFields().hashCode();
    memoizedHashCode = hash;
    return hash;
  }
<pre>
Custom headers to pass into fetch request.
Headers must have a maximum of 3 key value pairs.
Each key value pair must have a maximum of 256 characters per key and 256
characters per value.
</pre>

<code>map&lt;string, string&gt; headers = 1;</code>
java-video-stitcher/proto-google-cloud-video-stitcher-v1/src/main/java/com/google/cloud/video/stitcher/v1/FetchOptions.java