Method cleanup

src/cmap/connection.ts:356–367

* A method that cleans up the connection. When `force` is true, this method * forcibly destroys the socket. * * If an error is provided, any in-flight operations will be closed with the error. * * This method does nothing if the connection is already closed.

(error: Error)

   * This method does nothing if the connection is already closed.
   */
  private cleanup(error: Error): void {
    if (this.closed) {
      return;
    }

    this.socket.destroy();
    this.error = error;

    this.dataEvents?.throw(error).then(undefined, squashError);
    this.closed = true;
    this.emit(Connection.CLOSE);
  }

  private prepareCommand(db: string, command: Document, options: CommandOptions) {
    let cmd = { ...command };