Refactor

[codecov[bot]]

Codecov Report

All modified lines are covered by tests :white_check_mark:

Comparison is base (38d217b) 97.70% compared to head (8db1142) 97.76%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## 2.x #105 +/- ## ========================================== + Coverage 97.70% 97.76% +0.06% ========================================== Files 24 25 +1 Lines 1440 1479 +39 ========================================== + Hits 1407 1446 +39 Misses 33 33 ``` | [Files](https://app.codecov.io/gh/andrey-zherikov/argparse/pull/105?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Andrey+Zherikov) | Coverage Δ | | |---|---|---| | [source/argparse/api/restriction.d](https://app.codecov.io/gh/andrey-zherikov/argparse/pull/105?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Andrey+Zherikov#diff-c291cmNlL2FyZ3BhcnNlL2FwaS9yZXN0cmljdGlvbi5k) | `100.00% <ø> (ø)` | | | [source/argparse/internal/arguments.d](https://app.codecov.io/gh/andrey-zherikov/argparse/pull/105?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Andrey+Zherikov#diff-c291cmNlL2FyZ3BhcnNlL2ludGVybmFsL2FyZ3VtZW50cy5k) | `100.00% <100.00%> (ø)` | | | [source/argparse/internal/argumentuda.d](https://app.codecov.io/gh/andrey-zherikov/argparse/pull/105?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Andrey+Zherikov#diff-c291cmNlL2FyZ3BhcnNlL2ludGVybmFsL2FyZ3VtZW50dWRhLmQ=) | `97.05% <100.00%> (+0.04%)` | :arrow_up: | | [source/argparse/internal/command.d](https://app.codecov.io/gh/andrey-zherikov/argparse/pull/105?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Andrey+Zherikov#diff-c291cmNlL2FyZ3BhcnNlL2ludGVybmFsL2NvbW1hbmQuZA==) | `97.33% <100.00%> (+0.03%)` | :arrow_up: | | [source/argparse/internal/commandinfo.d](https://app.codecov.io/gh/andrey-zherikov/argparse/pull/105?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Andrey+Zherikov#diff-c291cmNlL2FyZ3BhcnNlL2ludGVybmFsL2NvbW1hbmRpbmZvLmQ=) | `100.00% <ø> (ø)` | | | [source/argparse/internal/help.d](https://app.codecov.io/gh/andrey-zherikov/argparse/pull/105?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Andrey+Zherikov#diff-c291cmNlL2FyZ3BhcnNlL2ludGVybmFsL2hlbHAuZA==) | `98.28% <100.00%> (ø)` | | | [source/argparse/internal/restriction.d](https://app.codecov.io/gh/andrey-zherikov/argparse/pull/105?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Andrey+Zherikov#diff-c291cmNlL2FyZ3BhcnNlL2ludGVybmFsL3Jlc3RyaWN0aW9uLmQ=) | `100.00% <100.00%> (ø)` | | | [source/argparse/internal/utils.d](https://app.codecov.io/gh/andrey-zherikov/argparse/pull/105?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Andrey+Zherikov#diff-c291cmNlL2FyZ3BhcnNlL2ludGVybmFsL3V0aWxzLmQ=) | `100.00% <ø> (ø)` | | | [source/argparse/package.d](https://app.codecov.io/gh/andrey-zherikov/argparse/pull/105?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Andrey+Zherikov#diff-c291cmNlL2FyZ3BhcnNlL3BhY2thZ2UuZA==) | `99.36% <100.00%> (ø)` | | | [source/argparse/result.d](https://app.codecov.io/gh/andrey-zherikov/argparse/pull/105?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Andrey+Zherikov#diff-c291cmNlL2FyZ3BhcnNlL3Jlc3VsdC5k) | `100.00% <100.00%> (ø)` | |

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