public DescribeFileSystemsRequest withMarker(String marker) {
        setMarker(marker);
        return this;
    }
<p>
(Optional) Opaque pagination token returned from a previous <code>DescribeFileSystems</code> operation (String).
If present, specifies to continue the list from where the returning call had left off.
</p>

@param marker
       (Optional) Opaque pagination token returned from a previous <code>DescribeFileSystems</code> operation
       (String). If present, specifies to continue the list from where the returning call had left off.
@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