You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: altscontext.pb.go
    path of file: ./repos/agones/vendor/google.golang.org/grpc/credentials/alts/internal/proto/grpc_gcp
    
    the code of the file until where you have to start completion: // Copyright 2018 The gRPC Authors
//
// Licen
    
func file_grpc_gcp_altscontext_proto_init() {
	if File_grpc_gcp_altscontext_proto != nil {
		return
	}
	file_grpc_gcp_transport_security_common_proto_init()
	if !protoimpl.UnsafeEnabled {
		file_grpc_gcp_altscontext_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
			switch v := v.(*AltsContext); i {
			case 0:
				return &v.state
			case 1:
				return &v.sizeCache
			case 2:
				return &v.unknownFields
			default:
				return nil
			}
		}
	}
	type x struct{}
	out := protoimpl.TypeBuilder{
		File: protoimpl.DescBuilder{
			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
			RawDescriptor: file_grpc_gcp_altscontext_proto_rawDesc,
			NumEnums:      0,
			NumMessages:   2,
			NumExtensions: 0,
			NumServices:   0,
		},
		GoTypes:           file_grpc_gcp_altscontext_proto_goTypes,
		DependencyIndexes: file_grpc_gcp_altscontext_proto_depIdxs,
		MessageInfos:      file_grpc_gcp_altscontext_proto_msgTypes,
	}.Build()
	File_grpc_gcp_altscontext_proto = out.File
	file_grpc_gcp_altscontext_proto_rawDesc = nil
	file_grpc_gcp_altscontext_proto_goTypes = nil
	file_grpc_gcp_altscontext_proto_depIdxs = nil
}