code: function sk(key) {
      if (globalKeySanitize) {
        return key;
      } else {
        return key.replace(/\s+/g, '_')
                  .replace(/\//g, '-')
                  .replace(/[^a-zA-Z_\-0-9\.]/g, '');
      }
    }
docs: Sanitize key for graphite if not done globally