/// <summary>
/// Retrieves a specific <see cref="Observation"/> object by its unique identifier.
/// </summary>
/// <typeparam name="T">An leaf of Observation</typeparam>
/// <param name="observationId">The observation id.</param>
/// <returns>Instance of <see cref="Observation"/></returns>
public static T Select <T>(int observationId) where T : Observation
{
return(BaseMapper.LoadSingleObjectByIntegerId <T>(Load <T>, SELECT_STORED_PROC, observationId));
}