+ * A group of cell views can be assigned the same context in order to
+ * ensure the sizes and cell alignments match across all the views with
+ * the same context.
+ *
+ * #GtkComboBox menus uses this to assign the same context to all cell views
+ * in the menu items for a single menu (each submenu creates its own
+ * context since the size of each submenu does not depend on parent
+ * or sibling menus).
+ *