ASTNode selectedNode = NodeFinder.perform(astRoot,
selection.getOffset(), selection.getLength());
if (fMarkExceptions || fMarkTypeOccurrences) {
ExceptionOccurrencesFinder exceptionFinder = new ExceptionOccurrencesFinder();
String message = exceptionFinder.initialize(astRoot, selectedNode);
if (message == null) {
matches = exceptionFinder.getOccurrences();
if (!fMarkExceptions && matches != null)
matches = null;
}