- GtkSourceCompletion — Main Completion Object
- GtkSourceCompletionContext — The context of a completion
- GtkSourceCompletionInfo — Calltips object
- GtkSourceCompletionItem — Simple implementation of GtkSourceCompletionProposal
- GtkSourceCompletionProposal — Completion proposal interface
- GtkSourceCompletionProvider — Completion provider interface
- GtkSourceCompletionWords — A GtkSourceCompletionProvider for the completion of words