| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| go/ast | Package ast declares the types used to represent syntax trees for Go packages. |
| go/parser | Package parser implements a parser for Go source files. |
| go/token | Package token defines constants representing the lexical tokens of the Go programming language and basic operations on tokens (printing, predicates). |
| io/ioutil | Package ioutil implements some I/O utility functions. |
| k8s.io/gengo/parser | Package parser provides code to parse go files, type-check them, extract the types. |
| k8s.io/gengo/types | Package types contains go type information, packaged in a way that makes auto-generation convenient, whether by template or straight go functions. |
| strings | Package strings implements simple functions to manipulate UTF-8 encoded strings. |
| unicode | Package unicode provides data and functions to test some properties of Unicode code points. |