images styles generation notice fix
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@@ -8,7 +8,7 @@ namespace Drupal\images_styles_gen;
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class CreateImagesStyles {
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public static function createStyles($item, &$context){
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if (!$context['sandbox']['progress']) {
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if (!array_key_exists('progress', $context['sandbox'])) {
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$context['sandbox']['progress'] = 0;
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}
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$context['sandbox']['progress']++;
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