public Builder setUrl(
        String value) {
      if (value == null) { throw new NullPointerException(); }
      url_ = value;
      bitField0_ |= 0x00000001;
      onChanged();
      return this;
    }
<code>string url = 1;</code>
@param value The url to set.
@return This builder for chaining.
examples/client/src/main/java/com/clickhouse/examples/protos/UIEvent.java