@Override
  public com.google.protobuf.ByteString
      getUrlBytes() {
    Object ref = url_;
    if (ref instanceof String) {
      com.google.protobuf.ByteString b = 
          com.google.protobuf.ByteString.copyFromUtf8(
              (String) ref);
      url_ = b;
      return b;
    } else {
      return (com.google.protobuf.ByteString) ref;
    }
  }
<code>string url = 1;</code>
@return The bytes for url.
examples/client/src/main/java/com/clickhouse/examples/protos/UIEvent.java