| bytes | Package bytes implements functions for the manipulation of byte slices. |
| encoding/json | Package json implements encoding and decoding of JSON as defined in RFC 7159. |
| errors | Package errors implements functions to manipulate errors. |
| github.com/BurntSushi/toml | Package toml implements decoding and encoding of TOML files. |
| github.com/gohugoio/hugo/parser/metadecoders | |
| gopkg.in/yaml.v2 | Package yaml implements YAML support for the Go language. |
| io | Package io provides basic interfaces to I/O primitives. |
| regexp | Package regexp implements regular expression search. |
| unicode | Package unicode provides data and functions to test some properties of Unicode code points. |
| unicode/utf8 | Package utf8 implements functions and constants to support text encoded in UTF-8. |