public DescribeFileSystemsRequest withCreationToken(String creationToken) {
        setCreationToken(creationToken);
        return this;
    }
<p>
(Optional) Restricts the list to the file system with this creation token (String). You specify a creation token
when you create an Amazon EFS file system.
</p>

@param creationToken
       (Optional) Restricts the list to the file system with this creation token (String). You specify a creation
       token when you create an Amazon EFS file system.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-efs/src/main/java/com/amazonaws/services/elasticfilesystem/model/DescribeFileSystemsRequest.java