### Question:
MultipleInstanceVariableEditorPresenter extends FieldEditorPresenter<String> { static String getRealType(String value) { if (isNullOrEmpty(value)) { return ""; } for (Map.Entry<String, String> entry : getMapDataTypeNamesToDisplayNames().entrySet()) { if (Objects.equals(value, entry.getValue())) { return entry.getKey(); } } return value; } @Inject  MultipleInstanceVariableEditorPresenter(final View view,
                                                   final SessionManager sessionManager); @PostConstruct void init(); @Override void setValue(String value); List<String> getSimpleDataTypes(); @Override void setReadOnly(boolean readOnly); void onVariableChange(); Path getDiagramPath(); static Map<String, String> getMapDataTypeNamesToDisplayNames();  }### Answer:
@Test public void testEmptyRealType() { assertEquals("", getRealType(null)); assertEquals("", getRealType("")); }