Completion

GtkSourceCompletion — Main Completion Object
GtkSourceCompletionContext — The context of a completion
GtkSourceCompletionProposal — interface for completion proposals
GtkSourceCompletionProvider — Completion provider interface
GtkSourceCompletionSnippets — A GtkSourceCompletionProvider for the completion of snippets
GtkSourceCompletionWords — A GtkSourceCompletionProvider for the completion of words