### Question:
ContextEditorDefinition extends BaseEditorDefinition<Context, ContextGridData> { @Override public Optional<Context> getModelClass() { return Optional.of(new Context()); } ContextEditorDefinition(); @Inject  ContextEditorDefinition(final DefinitionUtils definitionUtils,
                                   final SessionManager sessionManager,
                                   final SessionCommandManager<AbstractCanvasHandler> sessionCommandManager,
                                   final @DMNEditor DefaultCanvasCommandFactory canvasCommandFactory,
                                   final Event<ExpressionEditorChanged> editorSelectedEvent,
                                   final Event<RefreshFormPropertiesEvent> refreshFormPropertiesEvent,
                                   final Event<DomainObjectSelectionEvent> domainObjectSelectionEvent,
                                   final ListSelectorView.Presenter listSelector,
                                   final TranslationService translationService,
                                   final @DMNEditor Supplier<ExpressionEditorDefinitions> expressionEditorDefinitionsSupplier,
                                   final ValueAndDataTypePopoverView.Presenter headerEditor,
                                   final @DMNEditor ReadOnlyProvider readOnlyProvider); @Override ExpressionType getType(); @Override String getName(); @Override Optional<Context> getModelClass(); @Override void enrich(final Optional<String> nodeUUID,
                       final HasExpression hasExpression,
                       final Optional<Context> expression); @Override Optional<BaseExpressionGrid<? extends Expression, ? extends GridData, ? extends BaseUIModelMapper>> getEditor(final GridCellTuple parent,
                                                                                                                         final Optional<String> nodeUUID,
                                                                                                                         final HasExpression hasExpression,
                                                                                                                         final Optional<HasName> hasName,
                                                                                                                         final boolean isOnlyVisualChangeAllowed,
                                                                                                                         final int nesting);  }### Answer:
@Test public void testModelDefinition() { final Optional<Context> oModel = definition.getModelClass(); assertTrue(oModel.isPresent()); }