public DisassociateFacesRequest withCollectionId(String collectionId) {
        setCollectionId(collectionId);
        return this;
    }
<p>
The ID of an existing collection containing the UserID.
</p>

@param collectionId
       The ID of an existing collection containing the UserID.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-rekognition/src/main/java/com/amazonaws/services/rekognition/model/DisassociateFacesRequest.java