test: re-adding isPinned helper

daprahamian · mbroadst · commit aad05df741be · 2019-03-07T10:54:46.000-05:00
helper is needed for test runner in node-mongodb-native
diff --git a/lib/transactions.js b/lib/transactions.js
@@ -115,6 +115,10 @@ class Transaction {
     return this._recoveryToken;
   }
 
+  get isPinned() {
+    return !!this.server;
+  }
+
   /**
    * @ignore
    * @return Whether this session is presently in a transaction
