/// <summary>
/// Leverages the parts extents to get all Prrs.
/// Note that this optimization gives them to you in a slightly different order if using multi-site data
/// </summary>
public IEnumerable <Prr> OfExactTypePrr(IEnumerable <StdfRecord> records)
{
records.Any(); //TODO: I don't remember what this is for :(
return(from e in _PartsMap.GetAllExtents()
from p in GetRecordsInExtentsReverse(e).Select(r => r as Prr).TakeWhile(r => r != null)
select p);
}
