Add javadoc for new method

[leepoeaik]

No description provided.

[justinlengch]

LGTM!

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 71.25%. Comparing base (7166431) to head (a612858).
Report is 2 commits behind head on master.

Files	Patch %	Lines
.../main/java/seedu/address/ui/ScheduleListPanel.java	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master      #65      +/-   ##
============================================
- Coverage     72.84%   71.25%   -1.59%     
  Complexity      455      455              
============================================
  Files            77       79       +2     
  Lines          1569     1604      +35     
  Branches        157      160       +3     
============================================
  Hits           1143     1143              
- Misses          381      416      +35     
  Partials         45       45              

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