File activesupport/lib/active_support/deprecation.rb

• singleton
• active_support/deprecation/instance_delegator
• active_support/deprecation/behaviors
• active_support/deprecation/reporting
• active_support/deprecation/disallowed
• active_support/deprecation/constant_accessor
• active_support/deprecation/method_wrappers
• active_support/deprecation/proxy_wrappers
• active_support/deprecation/deprecators
• active_support/core_ext/module/deprecation
• concurrent/atomic/thread_local_var

• MODULE ActiveSupport
• CLASS ActiveSupport::Deprecation