SchemaExtension constructor throws NPE

[Naata]

constructor:

public SchemaExtension(URI schemaBaseUri) {
        this(null, schemaBaseUri);
}

refers to:

public SchemaExtension(String extensionId, URI schemaBaseUri) {
        super();
        Validate.notNull(extensionId);
        Validate.notNull(schemaBaseUri);
        if(StringUtils.isNoneBlank(extensionId)) {
            this.extensionId = extensionId;
        }
        this.schemaBaseUri = schemaBaseUri;
}

which results in NPE

[RobWin]

Thx for reporting.
Btw. If you use Swagger2Markup and like, we would love to get your GitHub star.