public void setItemCount(Long itemCount) {
        this.itemCount = itemCount;
    }
<p>
The number of items in the specified index. DynamoDB updates this value approximately every six hours. Recent
changes might not be reflected in this value.
</p>

@param itemCount
       The number of items in the specified index. DynamoDB updates this value approximately every six hours.
       Recent changes might not be reflected in this value.
aws-java-sdk-dynamodb/src/main/java/com/amazonaws/services/dynamodbv2/model/LocalSecondaryIndexDescription.java