namespace Drupal\migrate\Plugin\migrate\source;
/**
- * Source returning an empty row.
+ * Source returning a row based on the constants provided.
*
- * This is generally useful when needing to create a field using a migration..
+ * Example:
+ *
+ * @code
+ * source:
+ * plugin: empty
+ * constants:
+ * entity_type: user
+ * field_name: image
+ * @endcode
+ *
+ * This will return a single row containing 'entity_type' and 'field_name'
+ * elements, with values of 'user' and 'image', respectively.
*
* @MigrateSource(
* id = "empty"