| 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/document/internal/serde | |
| github.com/aws/smithy-go/encoding/json | |
| math/big | Package big implements arbitrary-precision arithmetic (big numbers). |
| reflect | Package reflect implements run-time reflection, allowing a program to manipulate objects with arbitrary types. |