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;
  }
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
HELPERS