diff --git a/gradle.properties b/gradle.properties
index a780ad9..8e4fd10 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -4,7 +4,7 @@ kotlin.code.style=official
 specifyKotlinAsDependency=false
 
 projectGroup=ru.dbotthepony.kommons
-projectVersion=2.1.0
+projectVersion=2.1.1
 
 guavaDepVersion=33.0.0
 gsonDepVersion=2.8.9
diff --git a/src/main/kotlin/ru/dbotthepony/kommons/io/DelegateSyncher.kt b/src/main/kotlin/ru/dbotthepony/kommons/io/DelegateSyncher.kt
index a5785ef..0a18f3c 100644
--- a/src/main/kotlin/ru/dbotthepony/kommons/io/DelegateSyncher.kt
+++ b/src/main/kotlin/ru/dbotthepony/kommons/io/DelegateSyncher.kt
@@ -749,6 +749,11 @@ class DelegateSyncher : Listenable<Unit>, Observer {
 			return delegate
 		}
 
+		fun add(other: Group): Group {
+			constructors.addAll(other.constructors)
+			return this
+		}
+
 		fun create(): DelegateSyncher {
 			return addInto(DelegateSyncher())
 		}