| context | Package context defines the Context type, which carries deadlines, cancellation signals, and other request-scoped values across API boundaries and between processes. |
| 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/internal/gocommand | Package gocommand is a helper for calling the go command. |
| strings | Package strings implements simple functions to manipulate UTF-8 encoded strings. |