We hope to get an instance of a once, and then call a. ***() in each script block.
Instead of getting an instance of A once in every block of code that needs to call A.
That makes it feel better to take advantage of the logical clarity of script code and reduce more useless code.
For example, I wrote in the first code box: const a = runtime. obkect ["a"]. get ** ** ();
Then I can call the instance a directly in each individual script box.