src/edu/kit/informatik/student_portal/Professor.java
/**
     * Gets the lectures with at least one mark assigned
     * @return TODO add doc
     */
Gets the lectures with at least one mark assigned
@return TODO add doc
Gets the lectures with at least one mark assigned @return TODO add doc
public Collection<Lecture> lecturesWithMarks() {
        return lectures.stream()
                .filter(lect->lect.numberMarks() != 0)
                .collect(Collectors.toList());
    }
public Collection < Lecture > lecturesWithMarks ( ) { return lectures . stream ( ) . filter ( lect -> lect . numberMarks ( ) != 0 ) . collect ( Collectors . toList ( ) ) ; }
Gets the lectures with at least one mark assigned
 @return TODO add doc
Gets the lectures with at least one mark assigned @return TODO add doc