code: function getGroupQueryFilter(groupName) {
    log.trace('getGroupQueryFilter(%s)', groupName);
    var self = this;
  
    if (! groupName) return('(objectCategory=Group)');
    if (isDistinguishedName.call(self, groupName)) {
      return('(&(objectCategory=Group)(distinguishedName='+parseDistinguishedName(groupName)+'))');
    }
    return('(&(objectCategory=Group)(cn='+groupName+'))');
  }
docs: Gets the ActiveDirectory LDAP query string for a group search.
  
  @private
  @param {String} groupName The name of the group
  @returns {String}