rhinefordã®æ—¥è¨˜active_support/core_ext/module.rb active_support/core_ext/module以下ã®ãƒ•ã‚¡ã‚¤ãƒ«ã‚’requireã™ã‚‹ã€‚ active_support/core_ext/module/aliasing.rb メソッドをaliasã™ã‚‹ãƒ¡ã‚½ãƒƒãƒ‰ã®å®šç¾©ã€‚ alias_method_chain(target, feature) alias_method :target_without_feature, :target alias_method :target, :target_with_feature ã¨åŒç¾©ã€‚targetメソッドをtarget_without_featureã¨ã„ã†ãƒ¡ã‚½ãƒƒãƒ‰ã«aliasã—ã¦ã€target_with_featureメソッドをtargetã«aliasã™ã‚‹ã€‚ target_with_feature（aliasã•ã‚ŒãŸtarget）
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