gotools/go/gcexportdata/importer.go

// NewImporter returns a new instance of the types.Importer interface
// that reads type information from export data files written by gc.
// The Importer also satisfies types.ImporterFrom.
//
// Export data files are located using "go build" workspace conventions
// and the build.Default context.
//
// Use this importer instead of go/importer.For("gc", ...) to avoid the
// version-skew problems described in the documentation of this package,
// or to control the FileSet or access the imports map populated during
// package loading.
//
// Deprecated: Use the higher-level API in golang.org/x/tools/go/packages,
// which is more efficient.
func NewImporter(fset *token.FileSet, imports map[string]*types.Package) types.ImporterFrom { … }

type importer …

func (imp importer) Import(importPath string) (*types.Package, error) { … }

func (imp importer) ImportFrom(importPath, srcDir string, mode types.ImportMode) (_ *types.Package, err error) { … }