// Import implements types.Importer.
func (w *Walker) Import(name string) (*types.Package, error) {
	return w.ImportFrom(name, "", 0)
}

// ImportFrom implements types.ImporterFrom.
func (w *Walker) ImportFrom(fromPath, fromDir string, mode types.ImportMode) (*types.Package, error) {
	pkg, err := w.importFrom(fromPath, fromDir, mode)
	if err != nil {
		return nil, err
	}
	return pkg.Package, nil
}

pkg go/types, method (*Package) SetName(string)
pkg go/types, type ImportMode int
pkg go/types, type ImporterFrom interface { Import, ImportFrom }
pkg go/types, type ImporterFrom interface, Import(string) (*Package, error)
pkg go/types, type ImporterFrom interface, ImportFrom(string, string, ImportMode) (*Package, error)
pkg html/template, func IsTrue(interface{}) (bool, bool)