print using lamda expression

Author: terakilobyte

docs/reference/content/driver/tutorials/aggregation.md

@@ -28,19 +28,8 @@ The [aggregation pipeline]({{<docsref "core/aggregation-pipeline" >}}) is a fram
      import com.mongodb.client.model.Accumulators;
      import com.mongodb.client.model.Projections;
      import com.mongodb.client.model.Filters;
-     
-     import org.bson.Document;
-     ```
-
-- Include the following code which the examples in the tutorials will use to print the results of the aggregation:
 
-     ```java
-     Block<Document> printBlock = new Block<Document>() {
-            @Override
-            public void apply(final Document document) {
-                System.out.println(document.toJson());
-            }
-        };
+     import org.bson.Document;
      ```
 
 ## Connect to a MongoDB Deployment
@@ -73,7 +62,7 @@ collection.aggregate(
               Aggregates.match(Filters.eq("categories", "Bakery")),
               Aggregates.group("$stars", Accumulators.sum("count", 1))
       )
-).forEach(printBlock);
+).forEach(doc -> System.out.println(doc.toJson()));
 ```
 
 ### Use Aggregation Expressions
@@ -98,7 +87,7 @@ collection.aggregate(
               )
           )
       )
-).forEach(printBlock);
+).forEach(doc -> System.out.println(doc.toJson()));
 ```
 
 ### Explain an Aggregation