js/libs/ember-data.js
function(attributeType, skipAssertion) {
    var transform = this.container.lookup('transform:' + attributeType);
    Ember.assert("Unable to find transform for '" + attributeType + "'", skipAssertion || !!transform);
    return transform;
  }
function(attributeType, skipAssertion) {
    var transform = this.container.lookup('transform:' + attributeType);
    Ember.assert("Unable to find transform for '" + attributeType + "'", skipAssertion || !!transform);
    return transform;
  }
HELPERS 
@method transformFor
@private
@param {String} attributeType
@param {Boolean} skipAssertion
@return {DS.Transform} transform