gtk.CellRendererCombo — an object that
    renders a gtk.ComboBoxEntry
    into a gtk.TreeView
    cell (new in PyGTK 2.6)
+--gobject.GObject +-- gtk.Object +-- gtk.CellRenderer +-- gtk.CellRendererText +-- gtk.CellRendererCombo
gtk.CellRendererText Properties
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This object is available in PyGTK 2.6 and above.
The gtk.CellRendererCombo
manages the rendering of a gtk.ComboBoxEntry
into a gtk.TreeView
cell.
    gtk.CellRendererCombo()| Returns : | the new cell renderer | 
This constructor is available in PyGTK 2.6 and above.
Creates a new gtk.CellRendererCombo. 
Rendering parameters are adjusted using the object properties. The object
properties can be set globally (with set_property()gtk.TreeViewColumn, 
you can bind a property to a value in a gtk.TreeModel.
For example, you can bind the "text" property on the cell renderer to a
string value in the model, thus rendering a different string in each row of
the gtk.TreeView.