ActiveSupport Multibyte Unicode Codepoint #lowercase_mapping attribute lowercase_mapping Ruby on Rails 4.1.16 Since v3.0.20 Last seen in v5.2.8.1 Available in: v3.0.20 v3.1.12 v3.2.22.5 v4.0.13 v4.1.16 v4.2.9 v5.2.8.1 Compare with: … v3.0.20 v3.1.12 v3.2.22.5 v4.0.13 v4.2.9 v5.2.8.1 No documentation comment.
