Homework 5 second time#23

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frolovGeorgy wants to merge 8 commits intoiaulitin:masterfrom

frolovGeorgy:homework_5_second_time

Commits on Oct 27, 2021

Homework 5 completed
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Commits on Oct 29, 2021

Commits on Nov 2, 2021

deleted unused imports, added constant names for goods
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Commits on Nov 3, 2021

Created custom exception, added new interface with getters
frolovGeorgy
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Created custom exception, added new interface with getters
frolovGeorgy
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Merge remote-tracking branch 'origin/homework_5_second_time' into homework_5_second_time
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