@java.lang.Override
      public Builder clear() {
        super.clear();
        bitField0_ = 0;
        widevine_ = null;
        if (widevineBuilder_ != null) {
          widevineBuilder_.dispose();
          widevineBuilder_ = null;
        }
        fairplay_ = null;
        if (fairplayBuilder_ != null) {
          fairplayBuilder_.dispose();
          fairplayBuilder_ = null;
        }
        playready_ = null;
        if (playreadyBuilder_ != null) {
          playreadyBuilder_.dispose();
          playreadyBuilder_ = null;
        }
        clearkey_ = null;
        if (clearkeyBuilder_ != null) {
          clearkeyBuilder_.dispose();
          clearkeyBuilder_ = null;
        }
        return this;
      }
<pre>
Defines configuration for DRM systems in use.
</pre>

Protobuf type {@code google.cloud.video.transcoder.v1.Encryption.DrmSystems}
java-video-transcoder/proto-google-cloud-video-transcoder-v1/src/main/java/com/google/cloud/video/transcoder/v1/Encryption.java