public static Prr GetMatchingPrr(this Pir pir)
{
return(pir.After()
.OfExactType <Prr>()
.Where(r => r.HeadNumber == pir.HeadNumber && r.SiteNumber == pir.SiteNumber)
.FirstOrDefault());
}
/// <summary>
/// Gets the records associated with this pir
/// </summary>
/// <param name="pir">The <see cref="Pir"/> representing the part</param>
/// <returns>The records associated with the part (between the <see cref="Pir"/>
/// and <see cref="Prr"/> and sharing the same head/site information.</returns>
public static IEnumerable <StdfRecord> GetChildRecords(this Pir pir)
{
return(pir.After()
.OfType <IHeadSiteIndexable>()
.Where(r => r.HeadNumber == pir.HeadNumber && r.SiteNumber == pir.SiteNumber)
.TakeWhile(r => r.GetType() != typeof(Prr))
.Cast <StdfRecord>());
}