Bug 97196 [quick fix] visibility linked proposals eat space
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/correction/LinkedCorrectionProposal.java
/**
	 * Returns all collected linked mode groups.
	 *
	 * @return all collected linked mode groups
	 */
	public LinkedModeGroup[] getLinkedModeGroups() {
		if (fLinkGroups == null)
			return new LinkedModeGroup[0];
		Collection values= fLinkGroups.values();
		return (LinkedModeGroup[])values.toArray(new LinkedModeGroup[values.size()]);
	}
	private LinkedModeGroup getLinkedModeGroup(String name) {
		if (fLinkGroups == null) {
			fLinkGroups= new HashMap();
		}
		LinkedModeGroup linkedGroup= (LinkedModeGroup) fLinkGroups.get(name);
		if (linkedGroup == null) {
			linkedGroup= new LinkedModeGroup();
			fLinkGroups.put(name, linkedGroup);
		}
		return linkedGroup;
	}
	/* (non-Javadoc)
	 * @see org.eclipse.jdt.internal.ui.text.correction.ChangeCorrectionProposal#performChange(org.eclipse.jface.text.IDocument, org.eclipse.ui.IEditorPart)
	 */
	protected void performChange(IEditorPart part, IDocument document) throws CoreException {
		try {
			super.performChange(part, document);
			if (part == null) {
				return;