public void setRelatedItemId(String relatedItemId) {
        this.relatedItemId = relatedItemId;
    }
<p>
Unique identifier of a related item.
</p>

@param relatedItemId
       Unique identifier of a related item.
aws-java-sdk-connectcases/src/main/java/com/amazonaws/services/connectcases/model/SearchRelatedItemsResponseItem.java