--- /dev/null
+<?php
+
+namespace Drupal\entity_browser\Events;
+
+use Drupal\Core\Form\FormStateInterface;
+
+/**
+ * Allows data for an entity browser element to be altered.
+ */
+class AlterEntityBrowserDisplayData extends EventBase {
+
+ /**
+ * Data to process.
+ *
+ * @var array
+ */
+ protected $data;
+
+ /**
+ * Form state object.
+ *
+ * @var \Drupal\Core\Form\FormStateInterface
+ */
+ protected $formState;
+
+ /**
+ * Plugin definition.
+ *
+ * @var array
+ */
+ protected $pluginDefinition;
+
+ /**
+ * Constructs a EntitySelectionEvent object.
+ *
+ * @param string $entity_browser_id
+ * Entity browser ID.
+ * @param string $instance_uuid
+ * Entity browser instance UUID.
+ * @param array $plugin_definition
+ * Plugin definition.
+ * @param \Drupal\Core\Form\FormStateInterface $form_state
+ * Form state object.
+ * @param array $data
+ * Data to process.
+ */
+ public function __construct($entity_browser_id, $instance_uuid, array $plugin_definition, FormStateInterface $form_state, array $data) {
+ parent::__construct($entity_browser_id, $instance_uuid);
+ $this->data = $data;
+ $this->formState = $form_state;
+ $this->pluginDefinition = $plugin_definition;
+ }
+
+ /**
+ * Gets form state.
+ *
+ * @return \Drupal\Core\Form\FormStateInterface
+ * Form state object.
+ */
+ public function getFormState() {
+ return $this->formState;
+ }
+
+ /**
+ * Gets data array.
+ *
+ * @return array
+ * Data array.
+ */
+ public function getData() {
+ return $this->data;
+ }
+
+ /**
+ * Gets plugin definition array.
+ *
+ * @return array
+ * Plugin definition array.
+ */
+ public function getPluginDefinition() {
+ return $this->pluginDefinition;
+ }
+
+ /**
+ * Sets data array.
+ *
+ * @param array $data
+ * Data array.
+ */
+ public function setData($data) {
+ $this->data = $data;
+ }
+
+}