AndroidTraining
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Refactoring to use lambda expressions.
- We refactored the source code... translating annonymous inner classes and enhanced for loops into lambda expressions
- we formated the resulting source code and ran all tests cases
I'm sorry for slow response. Thank you so much for your contribution. But this PR is hard to review...
I think 2 spaces indenting is fine. And I guess we should create another PR If we change indenting. Can you separate this PR?