src/main/java/com/zandero/utils/Assert.java
public static <T> void isNullOrEmpty(Set<T> set, String message) {

		isTrue(set == null || set.size() == 0, message);
	}
public static <T> void isNullOrEmpty(Set<T> set, String message) {

		isTrue(set == null || set.size() == 0, message);
	}
public static < T > void isNullOrEmpty ( Set < T > set , String message ) { isTrue ( set == null || set . size ( ) == 0 , message ) ; }
Tests if set is null or empty

@param set     must be null or empty
@param message to return in exception
@param <T>     object type
@throws IllegalArgumentException if list != null or list.size() greater than 0
Tests if set is null or empty