val tree = CachingLightTree(originalTree)
        val packageNode = packageNode(tree)
        val importNodes = importNodes(tree)
        val scriptNodes = scriptNodes(tree)

        val packages = packageHeader(tree, packageNode)
        val imports = importNodes.map { import(tree, it) }
        val statements = scriptNodes.map { statement(tree, it) }

        DependencyManagement importMgmt = importModel != null ? importModel.getDependencyManagement() : null;
        if (importMgmt == null) {
            importMgmt = DependencyManagement.newInstance();
        }

        // [MNG-5600] Dependency management import should support exclusions.

	// 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.

	imported map[string]bool
}

func (imp *resolveTestImporter) Import(string) (*Package, error) {
	panic("should not be called")
}

func (imp *resolveTestImporter) ImportFrom(path, srcDir string, mode ImportMode) (*Package, error) {
	if mode != 0 {
		panic("mode must be 0")
	}
	if imp.importer == nil {
		imp.importer = importer.Default().(ImporterFrom)
		imp.imported = make(map[string]bool)
	}

                    ModelProblemUtils.toId(groupId, artifactId, version), ModelProblemUtils.toSourceHint(model)));
        }

        Model importModel = null;
        if (workspaceResolver != null) {
            try {
                importModel = workspaceResolver.resolveEffectiveModel(groupId, artifactId, version);
            } catch (UnresolvableModelException e) {

	if s == "" {
		return def
	}
	return s
}

// An ImportMode controls the behavior of the Import method.
type ImportMode uint

const (
	// If FindOnly is set, Import stops after locating the directory
	// that should contain the sources for a package. It does not
	// read any files in the directory.
	FindOnly ImportMode = 1 << iota

	// If AllowBinary is set, Import can be satisfied by a compiled

	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)

	p, err := packageDataCache.Do(r.path, func() (*build.Package, error) {
		loaded = true
		var data struct {
			p   *build.Package
			err error
		}
		if r.dir != "" {
			var buildMode build.ImportMode
			buildContext := cfg.BuildContext
			if !cfg.ModulesEnabled {
				buildMode = build.ImportComment
			} else {
				buildContext.GOPATH = "" // Clear GOPATH so packages are imported as pure module packages
			}