[Validator] Modernize Custom constraints article (finishes #13898)#17335

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javiereguiluz merged 2 commits intosymfony:4.4from

wouterj:pull-13898

Oct 18, 2022

Commits on Oct 9, 2022

[Validator] Unit Tests

henry2778
authored and
wouterj
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Commits on Oct 16, 2022

[Validator] Combine #13898 with recent changes
wouterj
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