src/vs/workbench/services/dialogs/browser/abstractFileDialogService.ts/AbstractFileDialogService/getWorkspaceAvailableFileSystems
class AbstractFileDialogService:	protected getWorkspaceAvailableFileSystems(options: IPickAndOpenOptions): string[] {
		if (options.availableFileSystems && (options.availableFileSystems.length > 0)) {
			return options.availableFileSystems;
		}
		const availableFileSystems = [Schemas.file];
		if (this.environmentService.remoteAuthority) {
			availableFileSystems.unshift(Schemas.vscodeRemote);
		}
		return availableFileSystems;
	}