Let's say you have the following FXML :
<AnchorPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1">
   <children>
      <Button layoutX="20.0" layoutY="30.0" mnemonicParsing="false" text="Button" />
   </children>
</AnchorPane>

If you select the button, then invoke wrap in a container where children positioning is not user free, the new container will be added to the root AnchorPane with X=20 and Y=30. But these properties are not removed from the button.


Wrapping jobs should remove this unused property.