sema:   make(chan struct{}, preloadWorkerCount),
	}
	return pre
}

// preloadMatches loads data for package paths matched by patterns.
// When preloadMatches returns, some packages may not be loaded yet, but
// loadPackageData and loadImport are always safe to call.
func (pre *preload) preloadMatches(ctx context.Context, opts PackageOpts, matches []*search.Match) {
	for _, m := range matches {