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private final ObjectProperty<SomeModel> model = new SimpleObjectProperty<>();

private BooleanProperty disabled;
private Property<Boolean> modelDisabled;

{
    disabled = new SimpleBooleanProperty();
    modelDisabled = EasyBind.monadic(model).selectProperty(SomeModel::disabledProperty);
    disabled.bindBidirectional(modelDisabled);
}

private final ObjectProperty<SomeModel> model = new SimpleObjectProperty<>();

private BooleanProperty disabled;
private Property<Boolean> modelDisabled;

{
    disabled = new SimpleBooleanProperty();
    modelDisabled = EasyBind.monadic(model).selectProperty(SomeModel::disabledProperty).orElse(false);
    disabled.bindBidirectional(modelDisabled);
}

import javafx.application.Application;
import javafx.beans.property.SimpleStringProperty;
import javafx.beans.property.StringProperty;
import javafx.collections.FXCollections;
import javafx.collections.ListChangeListener;
import javafx.collections.ObservableList;
import javafx.geometry.Insets;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;
import javafx.util.StringConverter;

import org.controlsfx.control.CheckComboBox;
import org.fxmisc.easybind.EasyBind;

public class MapTest extends Application {
    public static void main(String[] args) { 
        launch(args); 
    } 

    private ObservableList<MapTestPerson> people = FXCollections.observableArrayList();

    @Override
    public void start(Stage primaryStage) throws Exception {
        initPeople();
        primaryStage.setScene(new Scene(createContent(primaryStage), 420, 200));
        primaryStage.show(); 
    }

    private void initPeople() {
        people.add(new MapTestPerson("Alfonso", "Cuarón"));
        people.add(new MapTestPerson("Ang", "Lee"));
        people.add(new MapTestPerson("Michel", "Hazanavicius"));
        people.add(new MapTestPerson("Tom", "Hooper"));
    }

    private Parent createContent(Stage primaryStage) {
        BorderPane pane = new BorderPane();
        pane.setPadding(new Insets(12));
        VBox box = new VBox(6);
        pane.setCenter(box);

        CheckComboBox<MapTestPerson> view = new CheckComboBox<MapTestPerson>(people);
        view.setConverter(new StringConverter<MapTestPerson>() {
            @Override
            public String toString(MapTestPerson object) {
                return object.getFirstName() + " " + object.getLastName();
            }
            @Override
            public MapTestPerson fromString(String string) {
                return null;
            }
        });
        box.getChildren().add(view);

        final ObservableList<MapTestPerson> selectedItems = view.getCheckModel().getCheckedItems();
        selectedItems.addListener((ListChangeListener<MapTestPerson>)change -> {
            while (change.next()) {
                System.out.println("selectedItems change: " + change);
            }
        });

        ObservableList<String> lastNames = EasyBind.map(selectedItems, p -> p.getLastName());
        lastNames.addListener((ListChangeListener<String>)change -> {
            while (change.next()) {
                System.out.println("lastNames change: " + change);
            }
        });

//      ListView<String> selectedView = new ListView<String>(lastNames);
//      box.getChildren().add(selectedView);

        return pane;
    }
}

class MapTestPerson {
    private StringProperty firstName = new SimpleStringProperty();
    private StringProperty lastName = new SimpleStringProperty();

    public MapTestPerson(String first, String last) {
        firstName.set(first);
        lastName.set(last);
    }

    @Override
    public String toString() {
        return firstName + " " + lastName;
    }

    public final StringProperty firstNameProperty() {
        return this.firstName;
    }

    public final String getFirstName() {
        return this.firstNameProperty().get();
    }

    public final void setFirstName(final String firstName) {
        this.firstNameProperty().set(firstName);
    }

    public final StringProperty lastNameProperty() {
        return this.lastName;
    }

    public final String getLastName() {
        return this.lastNameProperty().get();
    }

    public final void setLastName(final String lastName) {
        this.lastNameProperty().set(lastName);
    }
}

target.targetProperty().bind(
                EasyBind.map(source.sourceProperty(), mapping)
        );

EasyBind.map(source.sourceProperty(), mapping)
        .bindTo(target.targetProperty);