| bytes | Package bytes implements functions for the manipulation of byte slices. |
| encoding/gob | Package gob manages streams of gobs - binary values exchanged between an Encoder (transmitter) and a Decoder (receiver). |
| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| go/types | Package types declares the data types and implements the algorithms for type-checking of Go packages. |
| golang.org/x/tools/go/analysis | Package analysis defines the interface between a modular static analysis and an analysis driver program. |
| golang.org/x/tools/go/types/objectpath | Package objectpath defines a naming scheme for types.Objects (that is, named entities in Go programs) relative to their enclosing package. |
| golang.org/x/tools/internal/aliases | |
| io | Package io provides basic interfaces to I/O primitives. |
| log | Package log implements a simple logging package. |
| reflect | Package reflect implements run-time reflection, allowing a program to manipulate objects with arbitrary types. |
| sort | Package sort provides primitives for sorting slices and user-defined collections. |
| sync | Package sync provides basic synchronization primitives such as mutual exclusion locks. |