code: public void setTransactItems(java.util.Collection<TransactWriteItem> transactItems) {
          if (transactItems == null) {
              this.transactItems = null;
              return;
          }
  
          this.transactItems = new java.util.ArrayList<TransactWriteItem>(transactItems);
      }
docs: <p>
  An ordered array of up to 10 <code>TransactWriteItem</code> objects, each of which contains a
  <code>ConditionCheck</code>, <code>Put</code>, <code>Update</code>, or <code>Delete</code> object. These can
  operate on items in different tables, but the tables must reside in the same AWS account and region, and no two
  of them can operate on the same item.
  </p>
  
  @param transactItems
  An ordered array of up to 10 <code>TransactWriteItem</code> objects, each of which contains a
  <code>ConditionCheck</code>, <code>Put</code>, <code>Update</code>, or <code>Delete</code> object. These
  can operate on items in different tables, but the tables must reside in the same AWS account and region,
  and no two of them can operate on the same item.