code: function(groupName, resources, callback) {
          this.resourceGroupExists(groupName, function onGroupExistsResponse(err, exists) {
              if (err) {
                  return callback(err);
              }
  
              if (exists) {
                  return callback(new Error(
                      'Resource group `' + groupName + '` already exists'
                  ));
              }
  
              this.editResourceGroup(groupName, resources, callback);
          }.bind(this));
  
          return this;
      }
docs: Create a resource group, defining the resources that sohuld be available to it
  
  @param {String} groupName
  @param {Array} resources
  @param {Function} callback
  @return {ImboCflient}