Sets the model column which @combo_box should use to get string IDs for values from.
The column @id_column in the model of @combo_box must be of type %G_TYPE_STRING.
A column in @model to get string IDs for values from
See Implementation
Sets the model column which @combo_box should use to get string IDs for values from.
The column @id_column in the model of @combo_box must be of type %G_TYPE_STRING.