])
->addImageStyleMapping('responsive_image_test_module.narrow', '1x', [
'image_mapping_type' => 'image_style',
- 'image_mapping' => 'medium'
+ 'image_mapping' => 'medium',
])
// Test the normal output of mapping to an image style.
->addImageStyleMapping('responsive_image_test_module.wide', '1x', [