| bytes | Package bytes implements functions for the manipulation of byte slices. |
| 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/descfmt | Package descfmt provides functionality to format descriptors. |
| google.golang.org/protobuf/internal/descopts | Package descopts contains the nil pointers to concrete descriptor options. |
| google.golang.org/protobuf/internal/encoding/defval | Package defval marshals and unmarshals textual forms of default values. |
| google.golang.org/protobuf/internal/encoding/messageset | Package messageset encodes and decodes the obsolete MessageSet wire format. |
| google.golang.org/protobuf/internal/errors | Package errors implements functions to manipulate errors. |
| 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/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/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. |
| math | Package math provides basic constants and mathematical functions. |
| 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. |
| sync | Package sync provides basic synchronization primitives such as mutual exclusion locks. |
| sync/atomic | Package atomic provides low-level atomic memory primitives useful for implementing synchronization algorithms. |