return
			}
			s := string(data)
			s = s[:strings.LastIndex(s, "\n$$\n")]

			input := pkgbits.NewPkgDecoder(id, s)
			pkg = readUnifiedPackage(fset, nil, packages, input)
		case 'i':
			pkg, err = iImportData(fset, packages, buf, id)
		default:
			err = fmt.Errorf("import %q: old binary export format no longer supported (recompile library)", path)
		}

	default:

	structType
	interfaceType
	typeParamType
	instanceType
	unionType
)

// iImportData imports a package from the serialized package data
// and returns the number of bytes consumed and a reference to the package.
// If the export data version is not recognized or the format is otherwise
// compromised, an error is returned.