Update extra information shown in info for proposal. This should be implemented if your provider sets a custom info widget for proposal. This function MUST be implemented when gtk_source_completion_provider_get_info_widget is implemented.
A GtkSourceCompletionProposal
A GtkSourceCompletionInfo
See Implementation
Update extra information shown in info for proposal. This should be implemented if your provider sets a custom info widget for proposal. This function MUST be implemented when gtk_source_completion_provider_get_info_widget is implemented.