protected Set<GemEntity> getDataObjects() {
MetaModule targetMetaModule = workspace.getMetaModule(typeCheckInfo.getModuleName());
GemViewer gemViewer = new GemViewer();
gemViewer.addFilter(new UnorderedTypeMatchFilter(inputExpr, outputExpr, targetMetaModule.getTypeInfo(), true));
Perspective perspective = new Perspective(workspace, targetMetaModule);
perspective.setGemEntityViewer(gemViewer);
return getVisibleGemsFromPerspective(perspective);