DefaultIterableDiffer

    
      class DefaultIterableDiffer<V> implements IterableDiffer<V> ,IterableChanges<V> {  constructor(trackByFn?: TrackByFunction<V> | undefined);  readonly length: number;  readonly collection: V[] | Iterable<V> | null;  forEachItem(fn: (record: IterableChangeRecord_<V>) => void): void;  forEachOperation(fn: (item: IterableChangeRecord<V>, previousIndex: number | null, currentIndex: number | null) => void): void;  forEachPreviousItem(fn: (record: IterableChangeRecord_<V>) => void): void;  forEachAddedItem(fn: (record: IterableChangeRecord_<V>) => void): void;  forEachMovedItem(fn: (record: IterableChangeRecord_<V>) => void): void;  forEachRemovedItem(fn: (record: IterableChangeRecord_<V>) => void): void;  forEachIdentityChange(fn: (record: IterableChangeRecord_<V>) => void): void;  diff(collection: NgIterable<V> | null | undefined): DefaultIterableDiffer<V> | null;  onDestroy(): void;  check(collection: NgIterable<V>): boolean;  readonly isDirty: boolean;}