@java.lang.Override
    public Builder clear() {
      super.clear();
      bitField0_ = 0;
      contentDisposition_ = "";
      contentEncoding_ = "";
      contentLanguage_ = "";
      contentType_ = "";
      cacheControl_ = "";
      customTime_ = "";
      internalGetMutableCustomMetadata().clear();
      return this;
    }
<pre>
Describes options for object metadata update.
</pre>

Protobuf type {@code google.cloud.storagebatchoperations.v1.PutMetadata}
java-storagebatchoperations/proto-google-cloud-storagebatchoperations-v1/src/main/java/com/google/cloud/storagebatchoperations/v1/PutMetadata.java