public SearchRequestSource getSearchRequestSource() {
        return SearchRequestSource
                .builder()
                .sourceType(SourceType.DASHBOARD_UI)
                .ownerDocRef(dashboardDocRef)
                .componentId(componentId)
                .build();
    }
Initialises the model for passed expression and current result settings and returns
the corresponding {@link DashboardSearchRequest} object
stroom-core-client/src/main/java/stroom/dashboard/client/main/SearchModel.java