do not modify the License. You may add Your own attribution
          notices within Derivative Works that You distribute, alongside
          or as an addendum to the NOTICE text from the Work, provided
          that such additional attribution notices cannot be construed
          as modifying the License.

      You may add Your own copyright statement to Your modifications and

pkg expvar, func Publish(string, Var)
pkg expvar, method (*Float) Add(float64)
pkg expvar, method (*Float) Set(float64)
pkg expvar, method (*Float) String() string
pkg expvar, method (*Int) Add(int64)
pkg expvar, method (*Int) Set(int64)
pkg expvar, method (*Int) String() string
pkg expvar, method (*Map) Add(string, int64)
pkg expvar, method (*Map) AddFloat(string, float64)

pkg go/printer, const SourcePos = 8
pkg go/printer, const TabIndent = 2
pkg go/printer, const UseSpaces = 4
pkg go/printer, type Config struct, Indent int
pkg go/scanner, const ScanComments = 1
pkg go/token, const ADD = 12
pkg go/token, const ADD_ASSIGN = 23
pkg go/token, const AND = 17
pkg go/token, const AND_ASSIGN = 28
pkg go/token, const AND_NOT = 22
pkg go/token, const AND_NOT_ASSIGN = 33
pkg go/token, const ARROW = 36