How to TUniDBTreeGrid with hided column

[Freeman35]

Hello,

In TUniDBTreeGrid How to group (I mean treeview or nearly master-detail view) hided or not added column(s)

Table columns,1-) SELF_ID PrKey 2-)MST_ID masterkey 3-) any  

On screenshot,

1. ObjectInspector

2. From browser, can see treeview lies. but NOT grouped or node created for MST_ID

3. Firt two colums(SELF_ID & MST_ID) hide from TUniDBTreeGrid and you can see, still not grouped or node created. And treeview lines removed

 

Is this bug or what I'm doing wrong? or any suggesstion about master-detail view like this treeview

regards