Bug 267425 [Perspectives] problem with outline view and min/max
bundles/org.eclipse.ui.views/src/org/eclipse/ui/views/properties/PropertySheet.java
/**
     * No longer used but preserved to avoid api change
     */
    public static final String HELP_CONTEXT_PROPERTY_SHEET_VIEW = IPropertiesHelpContextIds.PROPERTY_SHEET_VIEW;
    /**
     * The initial selection when the property sheet opens
     */
    private ISelection bootstrapSelection;
    /**
     * The current selection of the property sheet
     */
    private ISelection currentSelection;
    /**
     * The current part for which this property sheets is active
     */
	private IWorkbenchPart currentPart;
	/**
	 * Whether this property sheet instance is pinned or not