| Lazy | Data.Map.Internal | 
| length | Data.Sequence.Internal, Data.Sequence | 
| levels | Data.Tree | 
| liftA2Seq | Data.Sequence.Internal | 
| link |  | 
| 1 (Function) | Data.Set.Internal | 
| 2 (Function) | Data.Map.Internal | 
| 3 (Function) | Data.IntMap.Internal | 
| link2 | Data.Map.Internal | 
| linkWithMask | Data.IntMap.Internal | 
| lmapWhenMissing |  | 
| 1 (Function) | Data.Map.Internal, Data.Map.Merge.Lazy | 
| 2 (Function) | Data.IntMap.Internal, Data.IntMap.Merge.Lazy | 
| lookup |  | 
| 1 (Function) | Data.Sequence.Internal, Data.Sequence | 
| 2 (Function) | Data.Map.Internal, Data.Map.Strict.Internal, Data.Map.Strict, Data.Map.Lazy, Data.Map | 
| 3 (Function) | Data.IntMap.Internal, Data.IntMap.Strict.Internal, Data.IntMap.Strict, Data.IntMap.Lazy, Data.IntMap | 
| lookupGE |  | 
| 1 (Function) | Data.Set.Internal, Data.Set | 
| 2 (Function) | Data.Map.Internal, Data.Map.Strict.Internal, Data.Map.Strict, Data.Map.Lazy, Data.Map | 
| 3 (Function) | Data.IntSet.Internal, Data.IntSet | 
| 4 (Function) | Data.IntMap.Internal, Data.IntMap.Strict.Internal, Data.IntMap.Strict, Data.IntMap.Lazy, Data.IntMap | 
| lookupGT |  | 
| 1 (Function) | Data.Set.Internal, Data.Set | 
| 2 (Function) | Data.Map.Internal, Data.Map.Strict.Internal, Data.Map.Strict, Data.Map.Lazy, Data.Map | 
| 3 (Function) | Data.IntSet.Internal, Data.IntSet | 
| 4 (Function) | Data.IntMap.Internal, Data.IntMap.Strict.Internal, Data.IntMap.Strict, Data.IntMap.Lazy, Data.IntMap | 
| lookupIndex |  | 
| 1 (Function) | Data.Set.Internal, Data.Set | 
| 2 (Function) | Data.Map.Internal, Data.Map.Strict.Internal, Data.Map.Strict, Data.Map.Lazy, Data.Map | 
| lookupLE |  | 
| 1 (Function) | Data.Set.Internal, Data.Set | 
| 2 (Function) | Data.Map.Internal, Data.Map.Strict.Internal, Data.Map.Strict, Data.Map.Lazy, Data.Map | 
| 3 (Function) | Data.IntSet.Internal, Data.IntSet | 
| 4 (Function) | Data.IntMap.Internal, Data.IntMap.Strict.Internal, Data.IntMap.Strict, Data.IntMap.Lazy, Data.IntMap | 
| lookupLT |  | 
| 1 (Function) | Data.Set.Internal, Data.Set | 
| 2 (Function) | Data.Map.Internal, Data.Map.Strict.Internal, Data.Map.Strict, Data.Map.Lazy, Data.Map | 
| 3 (Function) | Data.IntSet.Internal, Data.IntSet | 
| 4 (Function) | Data.IntMap.Internal, Data.IntMap.Strict.Internal, Data.IntMap.Strict, Data.IntMap.Lazy, Data.IntMap | 
| lookupMax |  | 
| 1 (Function) | Data.Set.Internal, Data.Set | 
| 2 (Function) | Data.Map.Internal, Data.Map.Strict.Internal, Data.Map.Strict, Data.Map.Lazy, Data.Map | 
| 3 (Function) | Data.IntMap.Internal, Data.IntMap.Strict.Internal, Data.IntMap.Strict, Data.IntMap.Lazy, Data.IntMap | 
| lookupMin |  | 
| 1 (Function) | Data.Set.Internal, Data.Set | 
| 2 (Function) | Data.Map.Internal, Data.Map.Strict.Internal, Data.Map.Strict, Data.Map.Lazy, Data.Map | 
| 3 (Function) | Data.IntMap.Internal, Data.IntMap.Strict.Internal, Data.IntMap.Strict, Data.IntMap.Lazy, Data.IntMap |