# File lib/active_support/vendor/i18n-0.4.1/i18n/backend/interpolation_compiler.rb, line 65
        def interpolate_or_raise_missing(key)
          escaped_key = escape_key_sym(key)
          Base::RESERVED_KEYS.include?(key) ? reserved_key(escaped_key) : interpolate_key(escaped_key)
        end