imp: I-8144 autoClose account reconcile entries

src/Entity/AccountingAccount.php

@@ -562,4 +562,18 @@ class AccountingAccount extends ContentEntityBase implements AccountingAccountIn
     return $fields;
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  public function transitionClose() {
+    if ($this->getCurrentBalance() <> 0) {
+      return;
+    }
+    \Drupal::service('accounting.book_entry')->reconcileEntryLines(
+      $this->getUnreconciledLines());
+
+    $this->setState('closed');
+    $this->save();
+  }
+
 }