src/vs/workbench/contrib/extensions/browser/extensions.contribution.ts/ExtensionsContributions/registerQuickAccessProvider
class ExtensionsContributions:	private registerQuickAccessProvider(): void {
		if (this.extensionManagementServerService.localExtensionManagementServer
			|| this.extensionManagementServerService.remoteExtensionManagementServer
			|| this.extensionManagementServerService.webExtensionManagementServer
		) {
			Registry.as<IQuickAccessRegistry>(Extensions.Quickaccess).registerQuickAccessProvider({
				ctor: InstallExtensionQuickAccessProvider,
				prefix: InstallExtensionQuickAccessProvider.PREFIX,
				placeholder: localize('installExtensionQuickAccessPlaceholder', "Type the name of an extension to install or search."),
				helpEntries: [{ description: localize('installExtensionQuickAccessHelp', "Install or Search Extensions") }]
			});
		}
	}