private void ensureEventsIsMutable() {
      if (!((bitField0_ & 0x00000800) != 0)) {
        events_ = new java.util.ArrayList<com.google.cloud.video.stitcher.v1.Event>(events_);
        bitField0_ |= 0x00000800;
      }
    }
<pre>
The ID used to identify the desired placement on a publisher's page.
Values to be used should be discussed between publishers and
advertisers.
</pre>

<code>string ad_slot_id = 8;</code>

@param value The bytes for adSlotId to set.
@return This builder for chaining.
java-video-stitcher/proto-google-cloud-video-stitcher-v1/src/main/java/com/google/cloud/video/stitcher/v1/Companion.java