/// <summary>
/// This method requires a user id in order to get all the prestation indicators of that user.
/// </summary>
/// <param name="id">The id</param>
/// <returns>Returns a list of all the prestation indicators of the selected user.</returns>
public List <PrestationIndicator> getPrestationIndicatorsById(int id)
{
// return list of prestation indicators
QueryStrings queryStrings = new QueryStrings();
List <PrestationIndicator> piList = queryStrings.getPrestationIndicatorsById(id);
return(piList);
}