private void logCompletionProvidersCount() {
//        GWT.log("Delegated completers count: " + editorIdToCompletionProviderMap.values().stream()
//                .mapToLong(List::size)
//                .sum());
    }
Register completion providers specific to an editor and a mode
stroom-core-client-widget/src/main/java/stroom/editor/client/presenter/DelegatingAceCompleter.java