Make `AbstractMapCodec` package-access
@@ -23,7 +23,7 @@ import org.bson.BsonWriter;
import java.util.HashMap;
import java.util.Map;
-public abstract class AbstractMapCodec<T> implements Codec<Map<String, T>> {
+abstract class AbstractMapCodec<T> implements Codec<Map<String, T>> {
abstract T readValue(BsonReader reader, DecoderContext decoderContext);
