fixed issue 501

[dfarkhutdinova]

@yegor256 here is the issue #501 fixed

I added the missing test and checked its correctness. Now there is a test that checks the value of the TLCOM metric for the OneMethodCreatesLambda class

[yegor256]

@dfarkhutdinova you should also remove the todo puzzle from the code

[dfarkhutdinova]

@yegor256 done, check please!

[yegor256]

@rultor merge

[rultor]

@rultor merge

@yegor256 OK, I'll try to merge now. You can check the progress of the merge here

[rultor]

@rultor merge

@yegor256 Done! FYI, the full log is here (took me 18min)

[yegor256]

@dfarkhutdinova thanks!