[CLOSED] GroupHeaderTplString question

[cwolcott]

I know this is fixed in ExtJS 5.1.1 and going to Ext.NET 3.2.0, but I have not upgraded yet.

You made the following suggestion in
Thread 52321 [CLOSED] Grouping grids how to get rendered group value in the group header text

        var getGroupText = function (values, parent) {
            var grid = parent.view.panel,
                col = grid.headerCt.child(Ext.String.format("gridcolumn[dataIndex={0}]", values.groupField)),
                value = values.groupValue;

            if (col.renderer) {
                value = col.renderer.apply(col, [value]); // You might need to pass other parameters that is used inside a Column's Renderer
            }

            return Ext.String.format("{0}: {1}", values.columnName, value);
        };

I need to pass metadata and record parameters into my renderer, how do I retrieve the values to pass?