# File lib/vcr/http_stubbing_adapters/common.rb, line 50
      def check_version!
        case compare_version
          when :too_low
            raise "You are using #{library_name} #{version}.  VCR requires version #{version_requirement}."
          when :too_high
            warn "You are using #{library_name} #{version}.  VCR is known to work with #{library_name} #{version_requirement}.  It may not work with this version."
        end
      end