code: function get (modelName, passByReference) {
  
      if (passByReference) {
          return linz.get('models')[modelName];
      }
  
      return clone(linz.get('models')[modelName]);
  }
docs: Get linz model by cloning a copy (default) or by reference
  @param  {String} modelName       Name of model
  @param  {Boolean} passByReference Specific if result should be a cloned copy or by reference. Default to return a cloned copy
  @return {Object}                 Model object either by a cloned copy or by reference