/**
* Returns true if the specified field is optional.
*
* @param field to check
* @return true if optional
*/
public static boolean isOptionalField(@NotNull Field field) {
ResourceField rf = field.getAnnotation(ResourceField.class);
ListField lf = field.getAnnotation(ListField.class);
PrimaryKey pk = field.getAnnotation(PrimaryKey.class);
return (rf != null && rf.value()) || (lf != null && lf.optional()) || (pk != null);
}
