EDIT

package eu.etaxonomy.taxeditor.editor.view.derivate;

import org.eclipse.core.expressions.PropertyTester;

public class DerivativeEditorPropertyTester extends PropertyTester {

    public DerivativeEditorPropertyTester() {

        // TODO Auto-generated constructor stub

    }

    @Override

    public boolean test(Object receiver, String property, Object[] args, Object expectedValue) {

        DerivateView derivateView = (DerivateView)receiver;

        if(property.equals("isLinkedWithTaxonSelection")){ //$NON-NLS-1$

            return derivateView.isListenToSelectionChange();

        }

        return false;

    }

}