How to use the @here/harp-omv-datasource.OmvFilterString.StringMatch function in @here/harp-omv-datasource

label: "OpenStreetMap contributors",
                link: "https://www.openstreetmap.org/copyright"
            }
        ]);

    //filter all but one layer on one of the mapviews
    const filterBuilder = new OmvFeatureFilterDescriptionBuilder({
        processLayersDefault: true
    });

    filterBuilder.ignoreLayer("boundaries", OmvFilterString.StringMatch.Match);
    filterBuilder.ignoreLayer("water", OmvFilterString.StringMatch.Match);
    filterBuilder.ignoreLayer("landuse", OmvFilterString.StringMatch.Match);
    filterBuilder.ignoreLayer("earth", OmvFilterString.StringMatch.Match);
    filterBuilder.ignoreLayer("places", OmvFilterString.StringMatch.Match);
    filterBuilder.ignoreLayer("pois", OmvFilterString.StringMatch.Match);
    filterBuilder.ignoreLayer("buildings", OmvFilterString.StringMatch.Match);
    filterBuilder.ignoreLayer("transit", OmvFilterString.StringMatch.Match);
    //filterBuilder.ignoreLayer("roads", OmvFilterString.StringMatch.Match);

    const filterDescr = filterBuilder.createDescription();
    dataSources.omvDataSource2.setDataFilter(filterDescr);

    // end:vislib_multiview_mapDiffView_2.ts
    /**
     * A function that copies the position and orientation of one MapView/MapControl to the others
     * @param srcView Source with MapView with current location and MapControl with current camera
     *                  position and orientation
     * @param destView Destination MapView synced to current location; MapControl synced to current
     *                  position and orientation
     */
    // snippet:vislib_multiview_mapDiffView_3.ts

.attach(mapViews.view1.mapView)
        .attach(mapViews.view2.mapView)
        .setDefaults([
            {
                id: "openstreetmap.org",
                label: "OpenStreetMap contributors",
                link: "https://www.openstreetmap.org/copyright"
            }
        ]);

    //filter all but one layer on one of the mapviews
    const filterBuilder = new OmvFeatureFilterDescriptionBuilder({
        processLayersDefault: true
    });

    filterBuilder.ignoreLayer("boundaries", OmvFilterString.StringMatch.Match);
    filterBuilder.ignoreLayer("water", OmvFilterString.StringMatch.Match);
    filterBuilder.ignoreLayer("landuse", OmvFilterString.StringMatch.Match);
    filterBuilder.ignoreLayer("earth", OmvFilterString.StringMatch.Match);
    filterBuilder.ignoreLayer("places", OmvFilterString.StringMatch.Match);
    filterBuilder.ignoreLayer("pois", OmvFilterString.StringMatch.Match);
    filterBuilder.ignoreLayer("buildings", OmvFilterString.StringMatch.Match);
    filterBuilder.ignoreLayer("transit", OmvFilterString.StringMatch.Match);
    //filterBuilder.ignoreLayer("roads", OmvFilterString.StringMatch.Match);

    const filterDescr = filterBuilder.createDescription();
    dataSources.omvDataSource2.setDataFilter(filterDescr);

    // end:vislib_multiview_mapDiffView_2.ts
    /**
     * A function that copies the position and orientation of one MapView/MapControl to the others
     * @param srcView Source with MapView with current location and MapControl with current camera