# File lib/active_support/vendor/i18n-0.4.1/i18n/backend/base.rb, line 203
        def interpolate_lambda?(object, string, key)
          object.respond_to?(:call) && string =~ /%\{#{key}\}|%\<#{key}>.*?\d*\.?\d*[bBdiouxXeEfgGcps]\}/
        end