Function sourceview5_sys::gtk_source_completion_context_set_proposals_for_provider

pub unsafe extern "C" fn gtk_source_completion_context_set_proposals_for_provider(
    self_: *mut GtkSourceCompletionContext, 
    provider: *mut GtkSourceCompletionProvider, 
    results: *mut GListModel
)

This is supported on crate feature v5_0 only.