public Event withItemId(String itemId) {
        setItemId(itemId);
        return this;
    }
<p>
The item ID key that corresponds to the <code>ITEM_ID</code> field of the Item interactions dataset's schema.
</p>

@param itemId
       The item ID key that corresponds to the <code>ITEM_ID</code> field of the Item interactions dataset's
       schema.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-personalizeevents/src/main/java/com/amazonaws/services/personalizeevents/model/Event.java