TreeViewColumn.cellGetSize

void cellGetSize(out int xOffset, out int yOffset, out int width, out int height) nothrow

Obtains the width and height needed to render the column. This is used primarily by the gtk.tree_view.TreeView.

`xOffset`	location to return x offset of a cell relative to cell_area
`yOffset`	location to return y offset of a cell relative to cell_area
`width`	location to return width needed to render a cell
`height`	location to return height needed to render a cell

Use GtkColumnView instead