public Builder clearId() {
      id_ = getDefaultInstance().getId();
      bitField0_ = (bitField0_ & ~0x00000001);
      onChanged();
      return this;
    }
<pre>
Required. Identifier for this set of encryption options. The ID must be
1-63 characters in length. The ID must begin and end with a letter
(regardless of case) or a number, but can contain dashes or underscores in
between.
</pre>

<code>string id = 1 [(.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/Encryption.java