// The semantics is like for ImporterFrom.ImportFrom except that
	// dir and mode are ignored (since they are not present).
	Import(path string) (*Package, error)
}

// ImportMode is reserved for future use.
type ImportMode int

// An ImporterFrom resolves import paths to packages; it
// supports vendoring per https://golang.org/s/go15vendor.
// Use go/importer to obtain an ImporterFrom implementation.

	// The semantics is like for ImporterFrom.ImportFrom except that
	// dir and mode are ignored (since they are not present).
	Import(path string) (*Package, error)
}

// ImportMode is reserved for future use.
type ImportMode int

// An ImporterFrom resolves import paths to packages; it
// supports vendoring per https://golang.org/s/go15vendor.
// Use go/importer to obtain an ImporterFrom implementation.

	pkg  *Package
	err  error
}

func (c *stdlibChecker) Import(path string) (*Package, error) {
	panic("unimplemented: use ImportFrom")
}

func (c *stdlibChecker) ImportFrom(path, dir string, _ ImportMode) (*Package, error) {
	if path == "unsafe" {
		// unsafe cannot be type checked normally.
		return Unsafe, nil
	}

	p, err := build.Default.Import(path, dir, build.FindOnly)
	if err != nil {

}

var installgorootAll = godebug.New("installgoroot").Value() == "all"

// Import is the equivalent of build.Import given the information in Module.
func (rp *IndexPackage) Import(bctxt build.Context, mode build.ImportMode) (p *build.Package, err error) {
	defer unprotect(protect(), &err)

	ctxt := (*Context)(&bctxt)

	p = &build.Package{}

	p.ImportPath = "."
	p.Dir = filepath.Join(rp.modroot, rp.dir)