| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| google.golang.org/protobuf/encoding/protowire | Package protowire parses and formats the raw wire encoding. |
| google.golang.org/protobuf/internal/encoding/messageset | Package messageset encodes and decodes the obsolete MessageSet wire format. |
| google.golang.org/protobuf/internal/encoding/text | Package text implements the text format for protocol buffers. |
| google.golang.org/protobuf/internal/errors | Package errors implements functions to manipulate errors. |
| google.golang.org/protobuf/internal/flags | Package flags provides a set of flags controlled by build tags. |
| google.golang.org/protobuf/internal/genid | Package genid contains constants for declarations in descriptor.proto and the well-known types. |
| google.golang.org/protobuf/internal/order | Package order provides ordered access to messages and maps. |
| google.golang.org/protobuf/internal/pragma | Package pragma provides types that can be embedded into a struct to statically enforce or prevent certain language properties. |
| google.golang.org/protobuf/internal/set | Package set provides simple set data structures for uint64s. |
| google.golang.org/protobuf/internal/strs | Package strs provides string manipulation functionality specific to protobuf. |
| google.golang.org/protobuf/proto | Package proto provides functions operating on protocol buffer messages. |
| google.golang.org/protobuf/reflect/protoreflect | Package protoreflect provides interfaces to dynamically manipulate messages. |
| google.golang.org/protobuf/reflect/protoregistry | Package protoregistry provides data structures to register and lookup protobuf descriptor types. |
| strconv | Package strconv implements conversions to and from string representations of basic data types. |
| unicode/utf8 | Package utf8 implements functions and constants to support text encoded in UTF-8. |