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[yaffs-website] / web / core / lib / Drupal / Core / Field / RequiredFieldStorageDefinitionInterface.php

diff --git a/web/core/lib/Drupal/Core/Field/RequiredFieldStorageDefinitionInterface.php b/web/core/lib/Drupal/Core/Field/RequiredFieldStorageDefinitionInterface.php
new file mode 100644 (file)
index 0000000..d29e569
--- /dev/null
+++ b/web/core/lib/Drupal/Core/Field/RequiredFieldStorageDefinitionInterface.php
@@ -0,0 +1,21 @@
+<?php
+
+namespace Drupal\Core\Field;
+
+/**
+ * Defines an interface for required field storage definitions.
+ */
+interface RequiredFieldStorageDefinitionInterface {
+
+  /**
+   * Returns whether the field storage is required.
+   *
+   * If a field storage is required, NOT NULL constraints will be added
+   * automatically for the required properties of a field type.
+   *
+   * @return bool
+   *   TRUE if the field storage is required, FALSE otherwise.
+   */
+  public function isStorageRequired();
+
+}