-import org.asamk.signal.manager.groups.GroupId;
-import org.asamk.signal.manager.groups.GroupIdFormatException;
-import org.whispersystems.libsignal.util.guava.Optional;
-import org.whispersystems.signalservice.api.push.SignalServiceAddress;
+import com.fasterxml.jackson.annotation.JsonAutoDetect;
+import com.fasterxml.jackson.annotation.PropertyAccessor;
+import com.fasterxml.jackson.core.JsonGenerator;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.net.URLDecoder;
+import java.nio.charset.StandardCharsets;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Locale;
+import java.util.Map;
+import java.util.Optional;
+import java.util.stream.Collectors;