code: function(record_a, record_b) {
  
  		return this._properties_by_guid[record_a.guid][this._name] < this._properties_by_guid[record_b.guid][this._name];
  
  	}
docs: Compare values of this field in two records
  @param {Lava.data.Record} record_a
  @param {Lava.data.Record} record_b
  @returns {boolean} True, in case the value of this field in `record_a` is less than value in `record_b`