@java.lang.Override
  public int getSerializedSize() {
    int size = memoizedSize;
    if (size != -1) return size;

    size = 0;
    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(parent_)) {
      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, parent_);
    }
    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(filter_)) {
      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(2, filter_);
    }
    if (pageSize_ != 0) {
      size += com.google.protobuf.CodedOutputStream.computeInt32Size(3, pageSize_);
    }
    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(pageToken_)) {
      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(4, pageToken_);
    }
    if (((bitField0_ & 0x00000001) != 0)) {
      size += com.google.protobuf.CodedOutputStream.computeMessageSize(5, getReadMask());
    }
    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(orderBy_)) {
      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(6, orderBy_);
    }
    size += getUnknownFields().getSerializedSize();
    memoizedSize = size;
    return size;
  }
<pre>
A comma-separated list of fields to order by, sorted in ascending order.
Use "desc" after a field name for descending.
Supported fields:

  * `display_name`
  * `create_time`
  * `update_time`

Example: `display_name, create_time desc`.
</pre>

<code>string order_by = 6;</code>

@return The bytes for orderBy.
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/ListEndpointsRequest.java