Tuple <IIndex <K>, VectorConstruction> IIndexBuilder.DropItem <K>(Tuple <IIndex <K>, VectorConstruction> _arg10, K key)
{
Tuple <IIndex <K>, VectorConstruction> tuple1 = _arg10;
VectorConstruction vectorConstruction1 = tuple1.Item2;
IIndex <K> index = tuple1.Item1;
FSharpChoice <Unit, Tuple <K, long> > fsharpChoice = OptionalValueModule.MissingPresent <Tuple <K, long> >(index.Lookup(key, Lookup.Exact, (Func <long, bool>) new LinearIndex.DeedleIndicesIIndexBuilderDropItem()));
if (fsharpChoice is FSharpChoice <Unit, Tuple <K, long> > .Choice2Of2)
{
Tuple <K, long> tuple2 = ((FSharpChoice <Unit, Tuple <K, long> > .Choice2Of2)fsharpChoice).get_Item();
VectorConstruction vectorConstruction2 = VectorConstruction.NewDropRange(vectorConstruction1, RangeRestriction <long> .NewFixed(tuple2.Item2, tuple2.Item2));
ReadOnlyCollection <K> keys = index.Keys;
return(new Tuple <IIndex <K>, VectorConstruction>((IIndex <K>) new LinearIndex <K>(System.Array.AsReadOnly <K>(ArrayModule.OfSeq <K>(SeqModule.Filter <K>((Func <K, bool>) new LinearIndex.newKeys <K>(key), (IEnumerable <M0>)keys))), (IIndexBuilder)this, FSharpOption <bool> .Some(index.IsOrdered)), vectorConstruction2));
}
string paramName = nameof(key);
throw new ArgumentException(((Func <K, string>)ExtraTopLevelOperators.PrintFormatToString <Func <K, string> >((PrintfFormat <M0, Unit, string, string>) new PrintfFormat <Func <K, string>, Unit, string, string, K>("The key '%O' is not present in the index."))).Invoke(key), paramName);
}
