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<@U78L28DMX> The functions to configure col/row index are statics on the GridPane class itself. For example, to set the rowIndex of some Node, you do `GridPane.setRowIndex(someNode, index)`. But you already know this, since you used exactly these functions when you tried the builder approach?

duh!  let me get right on that. I have 2 mini client fires right now but I'll be back on in 1 hour

<@U0F3291QE> sorry for the lack of update, I've been out of town this weekend to see  my sister graduate :slightly_smiling_face:

<@U0F3291QE> you're totally right, I can't believe I forgot about the use of Gridpane.  I do have a question about DataFormat though, on trying to interact with my gridpane page, I get an error such that "java.lang.IllegalArgumentException: DataFormat 'eu.hansolo.tilesfx.Tile' already exists."

<@U0F3291QE> Apparently, this DataFormat already exists.  To my knowledge, I don't believe there's an existing one.

<@U78L28DMX> Oh cool, congrats to your sister!

<@U78L28DMX> I saw the picture in the main channel before I saw the thread, so I answered there about DataFormat - sorry :slightly_smiling_face: A companion object lets you define singleton variables and even functions (they turn into static functions) so that the DataFormat will only be defined once when the class is loaded. You can keep the DataFormat in the same class as long as that makes sense, just wrap the val in a `companion object{}` definition. Does that solve it?

*note I have a large task ahead of me today for a new client but I'll get back on this afternoon