--- /dev/null
+<?php
+
+namespace Drupal\slick\Plugin\Field\FieldFormatter;
+
+use Drupal\Core\Field\FieldDefinitionInterface;
+
+/**
+ * A Trait common for slick formatters.
+ */
+trait SlickFormatterTrait {
+
+ /**
+ * The slick field formatter manager.
+ *
+ * @var \Drupal\slick\SlickFormatterInterface
+ */
+ protected $formatter;
+
+ /**
+ * The slick field formatter manager.
+ *
+ * @var \Drupal\slick\SlickManagerInterface
+ */
+ protected $manager;
+
+ /**
+ * Returns the slick field formatter service.
+ */
+ public function formatter() {
+ return $this->formatter;
+ }
+
+ /**
+ * Returns the slick service.
+ */
+ public function manager() {
+ return $this->manager;
+ }
+
+ /**
+ * Returns the slick admin service shortcut.
+ */
+ public function admin() {
+ return \Drupal::service('slick.admin');
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function settingsSummary() {
+ return $this->admin()->settingsSummary($this);
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public static function isApplicable(FieldDefinitionInterface $field_definition) {
+ return $field_definition->getFieldStorageDefinition()->isMultiple();
+ }
+
+}