See: Description

| Class | Description | 
|---|---|
| DBIDIterAdapter | Iterator for classic collections. | 
| MaskedDBIDs | View on an ArrayDBIDs masked using a BitMask for efficient mask changing. | 
| MergedDBIDs | Merge the IDs of multiple layers into one. | 
| UnmodifiableArrayDBIDs | Unmodifiable wrapper for DBIDs. | 
| UnmodifiableDBIDs | Unmodifiable wrapper for DBIDs. |