1 files changed, 12 insertions, 0 deletions

diff --git a/subprojects/viatra-runtime-rete/src/main/java/tools/refinery/viatra/runtime/rete/itc/alg/representative/RepresentativeObserver.java b/subprojects/viatra-runtime-rete/src/main/java/tools/refinery/viatra/runtime/rete/itc/alg/representative/RepresentativeObserver.java
new file mode 100644
index 00000000..6b772fa8
--- /dev/null
+++ b/subprojects/viatra-runtime-rete/src/main/java/tools/refinery/viatra/runtime/rete/itc/alg/representative/RepresentativeObserver.java
@@ -0,0 +1,12 @@
+/*
+ * SPDX-FileCopyrightText: 2023 The Refinery Authors <https://refinery.tools/>
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package tools.refinery.viatra.runtime.rete.itc.alg.representative;
+
+import tools.refinery.viatra.runtime.matchers.util.Direction;
+
+public interface RepresentativeObserver {
+        void tupleChanged(Object node, Object representative, Direction direction);
+}