kubernetes/vendor/golang.org/x/tools/internal/typesinternal/toonew.go

// TooNewStdSymbols computes the set of package-level symbols
// exported by pkg that are not available at the specified version.
// The result maps each symbol to its minimum version.
//
// The pkg is allowed to contain type errors.
func TooNewStdSymbols(pkg *types.Package, version string) map[types.Object]string { … }