code: public TransactWriteItemsResult withItemCollectionMetrics(java.util.Map<String, java.util.List<ItemCollectionMetrics>> itemCollectionMetrics) {
          setItemCollectionMetrics(itemCollectionMetrics);
          return this;
      }
docs: <p>
  A list of tables that were processed by <code>TransactWriteItems</code> and, for each table, information about
  any item collections that were affected by individual <code>UpdateItem</code>, <code>PutItem</code> or
  <code>DeleteItem</code> operations.
  </p>
  
  @param itemCollectionMetrics
  A list of tables that were processed by <code>TransactWriteItems</code> and, for each table, information
  about any item collections that were affected by individual <code>UpdateItem</code>, <code>PutItem</code>
  or <code>DeleteItem</code> operations.
  @return Returns a reference to this object so that method calls can be chained together.