| bytes | Package bytes implements functions for the manipulation of byte slices. |
| compress/gzip | Package gzip implements reading and writing of gzip format compressed files, as specified in RFC 1952. |
| encoding/base64 | Package base64 implements base64 encoding as specified by RFC 4648. |
| encoding/hex | Package hex implements hexadecimal encoding and decoding. |
| encoding/json | Package json implements encoding and decoding of JSON as defined in RFC 7159. |
| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| github.com/aws/smithy-go/document | Package document provides interface definitions and error types for document types. |
| github.com/aws/smithy-go/encoding/cbor | Package cbor implements partial encoding/decoding of concise binary object representation (CBOR) described in [RFC 8949]. |
| github.com/aws/smithy-go/middleware | Package middleware provides transport agnostic middleware for decorating SDK handlers. |
| github.com/aws/smithy-go/testing/xml | package xml is xml testing package that supports xml comparison utility. |
| io | Package io provides basic interfaces to I/O primitives. |
| io/ioutil | Package ioutil implements some I/O utility functions. |
| math | Package math provides basic constants and mathematical functions. |
| net/http | Package http provides HTTP client and server implementations. |
| 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. |
| strings | Package strings implements simple functions to manipulate UTF-8 encoded strings. |
| sync | Package sync provides basic synchronization primitives such as mutual exclusion locks. |