public Builder clearSessionId() {
      sessionId_ = getDefaultInstance().getSessionId();
      bitField0_ = (bitField0_ & ~0x00000004);
      onChanged();
      return this;
    }
<code>string session_id = 3;</code>
@return This builder for chaining.
examples/client/src/main/java/com/clickhouse/examples/protos/UIEvent.java