public ListCourseTimetable filterByTimeListCourseTimetable courseTimetableListLocalDateTime startTime LocalDateTime endTime return courseTimetableListstreamfiltercourseTimetable - courseTimetab

This method filters a list of CourseTimetable objects based on a given start time and end time. It uses the stream() method to create a stream of courseTimetableList. Then, it applies two filters to the stream using lambda expressions.

The first filter checks if the CourseBeginTime of each CourseTimetable object is after the startTime. The second filter checks if the CourseBeginTime is before the endTime. Finally, it collects the filtered elements into a new list using the collect() method with Collectors.toList().

The method returns the filtered list of CourseTimetable objects