Bug 67890 [PropertiesView] Exception when entries added to properties view
bundles/org.eclipse.ui.views/src/org/eclipse/ui/views/properties/PropertySheetEntry.java
listener.valueChanged(this);
        }
    }
    /* (non-Javadoc)
     * Method declared on IPropertySheetEntry.
     */
    public String getCategory() {
        return descriptor.getCategory();
    }
    /* (non-Javadoc)
     * Method declared on IPropertySheetEntry.
     */
    public IPropertySheetEntry[] getChildEntries() {
        if (childEntries == null)
            createChildEntries();
        return childEntries;
    }
    /* (non-Javadoc)
     * Method declared on IPropertySheetEntry.
     */
    public String getDescription() {
        return descriptor.getDescription();
    }
    /**
     * Returns the descriptor for this entry.
     *
     * @return the descriptor for this entry
     * @since 3.1 (was previously private)
     */
    protected IPropertyDescriptor getDescriptor() {