Bug 319961 Reset perspective fails with parts moved into the editor area
1. Start a fresh e4 workbench 2. Move the Javadoc view into the editor area 3. Reset the perspective 4. Open the Javadoc view Result: The Javadoc view is opened in the editor area. In the bottom stack there still is a tab for the Javadoc view; this tab can be clicked, but it will activate the view in the editor area. The toolbar, however, is shown in the bottom stack.
bundles/org.eclipse.e4.ui.workbench/src/org/eclipse/e4/ui/workbench/modeling/EPartService.java
* @param part
	 *            the part to show
	 * @param partState
	 *            the desired state of the shown part to be in
	 * @return the shown part
	 */
	public MPart showPart(MPart part, PartState partState);
	/**
	 * Hides the given part. The part must be a part managed by this service.
	 * <p>
	 * If the part has been tagged with the {@link #REMOVE_ON_HIDE_TAG} tag, it will be removed from
	 * the model when the service hides it.
	 * </p>
	 * 
	 * @param part
	 *            the part to hide
	 */
	public void hidePart(MPart part);
	/**
	 * Returns a collection of all the dirty parts that are being managed by this service.
	 * 
	 * 
	 * @return a collection of dirty parts that are being managed by this service, never
	 *         <code>null</code>
	 */
	public Collection<MPart> getDirtyParts();
	/**
	 * Saves the contents of the part if it is dirty and returns whether the operation completed.
	 * 
	 * @param part