code: function (store, type, id) {
      id = coerceId(id);
      return this.fixturesForType(store, type).find(function (record) {
        return coerceId(record.id) === id;
      });
    }
docs: Get a fixture for a given type and ID
  
  @method fixtureForId
  @param {DS.Store} store
  @param {DS.Model} type
  @param {string|number} id
  @return {Object}