/// <summary>
/// Formats and adds the parameter to the <see cref="PutItemRequest"/>.
/// </summary>
/// <param name="request">The request.</param>
/// <param name="loggingEvent">The logging event.</param>
/// <returns>Chainable reference to the original request.</returns>
public virtual PutItemRequest AddFormatParameter(PutItemRequest request, LoggingEvent loggingEvent)
{
request.CheckNull("request");
loggingEvent.CheckNull("loggingEvent");
object formattedValue = Layout.Format(loggingEvent);
return AddToItemsIfNotNullOrEmpty(request, formattedValue);
}