GtkComboBoxEntry which has a GtkEntry as child and a list
of strings as popup. You can get the GtkEntry from a GtkComboBoxEntry
using GTK_ENTRY (GTK_BIN (combo_box_entry)->child). To add and remove
strings from the list, just modify model using its data manipulation
API.gtkComboBoxEntryNewWithModel(model, text.column, show = TRUE)modelGtkTreeModel.text.columnmodel to get the strings from.GtkWidget] A new GtkComboBoxEntry.