Bug 113239 new compiler option 'fatalOptionalError'
* COMPILER / Treating Optional Error as Fatal * When enabled, optional errors (i.e. optional problems which severity is set to "error") will be treated as standard * compiler errors, yielding problem methods/types preventing from running offending code until the issue got resolved. * When disabled, optional errors are only considered as warnings, still carrying an error indication to make them more * severe. Note that by default, errors are fatal, whether they are optional or not. * - option id: "org.eclipse.jdt.core.compiler.problem.fatalOptionalError" * - possible values: { "enabled", "disabled" } * - default: "enabled" </pre>
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/OptionsConfigurationBlock.java
Control parent= control.getParent();
		while (!(parent instanceof ScrolledPageContent) && parent != null) {
			parent= parent.getParent();
		}
		if (parent instanceof ScrolledPageContent) {
			return (ScrolledPageContent) parent;
		}
		return null;
	}
	
	protected ExpandableComposite getParentExpandableComposite(Control control) {
		Control parent= control.getParent();
		while (!(parent instanceof ExpandableComposite) && parent != null) {
			parent= parent.getParent();
		}
		if (parent instanceof ExpandableComposite) {
			return (ExpandableComposite) parent;
		}
		return null;
	}
	
	private void makeScrollableCompositeAware(Control control) {
		ScrolledPageContent parentScrolledComposite= getParentScrolledComposite(control);
		if (parentScrolledComposite != null) {
			parentScrolledComposite.adaptChild(control);
		}
	}
	
	protected ExpandableComposite createStyleSection(Composite parent, String label, int nColumns) {
		ExpandableComposite excomposite= new ExpandableComposite(parent, SWT.NONE, ExpandableComposite.TWISTIE | ExpandableComposite.CLIENT_INDENT);