update example references

Author: stephmarie17

source/includes/write/transaction.kt

@@ -9,28 +9,24 @@ data class Restaurant(val name: String, val cuisine: String)
 
 fun main() {
 // start-transaction
-    // Creates a new MongoClient with a connection string
+    // Creates a new MongoClient to manage your connection
     val client = MongoClients.create("<connection string>")
 
     // Gets the database and collection
     val database = client.getDatabase("sample_restaurants")
     val collection = database.getCollection<Restaurant>("restaurants")
 
-    // Defines options and inserts restaurants into the collection
+    // Inserts restaurants into the collection
     fun insertRestaurantsInTransaction(session: ClientSession) {
-        // Sets options for the collection operation within the transaction
-        val restaurantsCollectionWithOptions = collection
-            .withWriteConcern(WriteConcern("majority"))
-            .withReadConcern(ReadConcern.LOCAL)
 
         // Inserts restaurants within the transaction
-        restaurantsCollectionWithOptions.insertOne(
+        collection.insertOne(
             session,
-            Restaurant("name", "Kotlin Sync Pizza").append("cuisine", "Pizza")
+            Restaurant("Kotlin Sync Pizza", "Pizza")
         )
-        restaurantsCollectionWithOptions.insertOne(
+        collection.insertOne(
             session,
-            Restaurant("name", "Kotlin Sync Burger").append("cuisine", "Burger")
+            Restaurant("Kotlin Sync Burger", "Burger")
         )
     }
 

source/write/transactions.txt

@@ -117,11 +117,11 @@ transaction, and insert documents into a collection in one transaction
 through the following steps:
 
 1. Create a session from the client by using the ``startSession()`` method.
-#. Use the ``withTransaction()`` method to start a transaction.
-#. Insert multiple documents into the ``restaurants`` collection. The 
-   ``withTransaction()`` method runs the insert operation and commits the 
-   transaction. If any operation results in errors, ``withTransaction()`` 
-   cancels the transaction.
+#. Define the ``insertRestaurantsInTransaction`` method to insert multiple 
+   documents into the ``restaurants`` collection. 
+#. Use the ``withTransaction()`` method to start a transaction. The ``withTransaction()`` 
+   method runs the insert operation and commits the transaction. If any 
+   operation results in errors, ``withTransaction()`` cancels the transaction.
 #. Close the connection to the server by using the ``client.close()`` method.
 
 .. literalinclude:: /includes/write/transaction.kt