public Builder clearEventId() {
      eventId_ = getDefaultInstance().getEventId();
      bitField0_ = (bitField0_ & ~0x00000004);
      onChanged();
      return this;
    }
<pre>
Required. The ID of the event resource to be created.
This value must be 1-63 characters, begin and end with `[a-z0-9]`,
could contain dashes (-) in between.
</pre>

<code>string event_id = 3 [(.google.api.field_behavior) = REQUIRED];</code>

@return This builder for chaining.
java-video-live-stream/proto-google-cloud-live-stream-v1/src/main/java/com/google/cloud/video/livestream/v1/CreateEventRequest.java