Bug 131692 [Contributions] ContributionManager.insertAfter throws unhelpful IllegalArgumentException
look at insertBefore and you see this line throw new IllegalArgumentException("can't find ID " + ID);//$NON-NLS-1$ but in insertAfter it looks like this throw new IllegalArgumentException("can't find ID");//$NON-NLS-1$ NOTE: in the second example it doesn't tell you what the ID is. My "patch" is to make insertAfter behave like insertBefore
bundles/org.eclipse.jface/src/org/eclipse/jface/action/ContributionManager.java
if (ci == null) {
			throw new IllegalArgumentException("can't find ID");
		}
        int ix = contributions.indexOf(ci);
        if (ix >= 0) {
            
            if (allowItem(item)) {
                contributions.add(ix + 1, item);
                itemAdded(item);
            }
        }
    }
    /* (non-Javadoc)
     * Method declared on IContributionManager.
     */
    public void insertBefore(String ID, IAction action) {
        insertBefore(ID, new ActionContributionItem(action));
    }
    /* (non-Javadoc)
     * Method declared on IContributionManager.
     */
    public void insertBefore(String ID, IContributionItem item) {
        IContributionItem ci = find(ID);
        if (ci == null) {
			throw new IllegalArgumentException("can't find ID " + ID);
		}
        int ix = contributions.indexOf(ci);
        if (ix >= 0) {
            
            if (allowItem(item)) {