finished

src/main/java/rocks/zipcode/io/quiz3/collections/Student.java

@@ -2,6 +2,7 @@ package rocks.zipcode.io.quiz3.collections;
 
 import rocks.zipcode.io.quiz3.objectorientation.enums.LabStatus;
 
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.Map;