private static IMember getMember(IStructuredSelection selection) throws JavaScriptModelException {
if (selection.size() != 1) return null;
Object element = selection.getFirstElement();
if (!(element instanceof IMember)) return null;
if (element instanceof IFunction) {
IFunction method = (IFunction) element;
String returnType = method.getReturnType();
if (PrimitiveType.toCode(Signature.toString(returnType)) != null) return null;
return method;
} else if (element instanceof IField) {
return (IField) element;
}
return null;
}
