changed t() to ->t() when used in non static methods

src/Plugin/Field/FieldFormatter/BgImgFieldFormatter.php

@@ -140,10 +140,11 @@ class BgImgFieldFormatter extends ResponsiveImageFormatter implements ContainerF
 
     $responsive_image_style = $this->responsiveImageStyleStorage->load($this->getSetting('responsive_image_style'));
     if ($responsive_image_style) {
-      $summary[] = t('Responsive image style: @responsive_image_style', ['@responsive_image_style' => $responsive_image_style->label()]);
+      $summary[] = $this->t('Responsive image style: @responsive_image_style',
+        ['@responsive_image_style' => $responsive_image_style->label()]);
     }
     else {
-      $summary[] = t('Select a responsive image style.');
+      $summary[] = $this->t('Select a responsive image style.');
     }
 
     return $summary;

src/Plugin/Field/FieldType/BgImgItem.php

@@ -139,8 +139,8 @@ class BgImgItem extends ImageItem {
 
     $elements['css_settings'] = [
       '#type' => 'details',
-      '#title' => t('CSS Settings'),
-      '#description' => t('Set default CSS properties for the background image.'),
+      '#title' => $this->t('CSS Settings'),
+      '#description' => $this->t('Set default CSS properties for the background image.'),
       '#open' => FALSE,
     ];
 
@@ -153,8 +153,8 @@ class BgImgItem extends ImageItem {
     // The css selector input field needed to.
     $elements['css_settings']['css_selector'] = [
       '#type'             => 'textfield',
-      '#title'            => t('Selector'),
-      '#description'      => t('CSS Selector for background image.'),
+      '#title'            => $this->t('Selector'),
+      '#description'      => $this->t('CSS Selector for background image.'),
       '#default_value'    => $css_option_settings['css_selector'],
       '#token_types'      => $token_types,
       '#element_validate' => 'token_element_validate',
@@ -171,55 +171,56 @@ class BgImgItem extends ImageItem {
     // User ability to select a background repeat option.
     $elements['css_settings']['css_repeat'] = [
       '#type' => 'radios',
-      '#title' => t('Repeat Options'),
-      '#description' => t('Add the css no repeat value to the background image.'),
+      '#title' => $this->t('Repeat Options'),
+      '#description' => $this->t('Add the css no repeat value to the background image.'),
       '#default_value' => $css_option_settings['css_repeat'],
       '#options' => [
-        "inherit" => t("inherit"),
-        "no-repeat" => t("no-repeat"),
-        "repeat" => t('repeat'),
+        "inherit" => $this->t("inherit"),
+        "no-repeat" => $this->t("no-repeat"),
+        "repeat" => $this->t('repeat'),
       ],
     ];
 
     // User the ability to choose background size.
     $elements['css_settings']['css_background_size'] = [
       '#type' => 'radios',
-      '#title' => t('Background Size'),
-      '#description' => t("Add the background size setting you would like for the image, use inherit for default."),
+      '#title' => $this->t('Background Size'),
+      '#description' => $this->t("Add the background size setting you would like for the image, use inherit for default."),
       '#default_value' => $css_option_settings['css_background_size'],
       '#options' => [
-        'inherit' => t('inherit'),
-        'auto' => t('auto'),
-        'cover' => t('cover'),
-        'contain' => t('contain'),
-        'initial' => t('initial'),
+        'inherit' => $this->t('inherit'),
+        'auto' => $this->t('auto'),
+        'cover' => $this->t('cover'),
+        'contain' => $this->t('contain'),
+        'initial' => $this->t('initial'),
       ],
     ];
 
     // User the ability to set the background position.
     $elements['css_settings']['css_background_position'] = [
       '#type' => 'radios',
-      '#title' => t('Background Position'),
-      '#description' => t('Set a background position, leave unchecked to have your own in your theme css.'),
+      '#title' => $this->t('Background Position'),
+      '#description' => $this->t('Set a background position, leave unchecked to
+      # have your own in your theme css.'),
       '#default_value' => $css_option_settings['css_background_position'],
       '#options' => [
-        "inherit" => t("inherit"),
-        "left top" => t("left top"),
-        "left center" => t("left center"),
-        "left bottom" => t("left bottom"),
-        "right top" => t("right bottom"),
-        "right center" => t("right center"),
-        "right bottom" => t("right bottom"),
-        "center top" => t("center top"),
-        "center center" => t("center center"),
-        "center bottom" => t("center bottom"),
+        "inherit" => $this->t("inherit"),
+        "left top" => $this->t("left top"),
+        "left center" => $this->t("left center"),
+        "left bottom" => $this->t("left bottom"),
+        "right top" => $this->t("right bottom"),
+        "right center" => $this->t("right center"),
+        "right bottom" => $this->t("right bottom"),
+        "center top" => $this->t("center top"),
+        "center center" => $this->t("center center"),
+        "center bottom" => $this->t("center bottom"),
       ],
       '#tree' => TRUE,
     ];
 
     $elements['file_settings'] = [
       '#type' => 'details',
-      '#title' => t("File Settings"),
+      '#title' => $this->t("File Settings"),
       '#open' => FALSE,
     ] + $parentElements;