// Private constructor for singleton design.
providers.add(new AgentHistory());
providers.add(new ChatNotes());
providers.add(new OfflineSettingsProvider());
providers.add(new SearchProvider());
providers.add(new WorkgroupFormProvider());
providers.add(new MacroProvider());
providers.add(new ChatMetadataProvider());
providers.add(new SiteTracker());
providers.add(new SoundProvider());
providers.add(new WorkgroupPropertiesProvider());