deprecation_message

# File activesupport/lib/active_support/deprecation/reporting.rb, line 31
        def deprecation_message(callstack, message = nil)
          message ||= "You are using deprecated behavior which will be removed from the next major or minor release."
          message += '.' unless message =~ /\.$/
          "DEPRECATION WARNING: #{message} #{deprecation_caller_message(callstack)}"
        end