A DESCRIPTION OF THE PROBLEM :
Just as there is the method java.util.Objects.requireNonNull (..), it would be great if there is a similar method for collections that checks whether the collection is not null or empty.

Java pseudocode:

class java.util.Collections {

public static <T extends java.util.Collection<?>> T getNotEmpty( T collection) {
// Check if collection is null. If so, throw NullPointerException
java.util.Objects.requireNonNull(collection);

// Check if collection is empty. If so, throw Exception
if (collection.isEmpty()) {
throw new Exception("Collection is empty");
}
return collection;
}

}