message: The babel helper objectWithoutProperties call objectWithoutPropertiesLoose now included in generate-helpers.js
diff: @@ -73,6 +73,7 @@ const mainHelpers = [
  // es2015 destructuring
  'objectDestructuringEmpty',
  'objectWithoutProperties',
  + 'objectWithoutPropertiesLoose',
  // es2015 template-literals
  'taggedTemplateLiteral',
  