problem is after following a tutorial I keep getting the following error:
Class 'DataTableDataSource' incorrectly extends base class 'DataSource<DataTableItem>'.
Types of property 'connect' are incompatible.
Type '() => Observable<any>' is not assignable to type '(collectionViewer: CollectionViewer) => Observable<DataTableItem>'.
Type 'Observable<any>' is not assignable to type 'Observable<DataTableItem>'.
Property 'source' is protected but type 'Observable<T>' is not a class derived from 'Observable<T>'.