diff --git a/lib/src/dart_observable/observables/observation.dart b/lib/src/dart_observable/observables/observation.dart
new file mode 100644
index 0000000..4735c7c
--- /dev/null
+++ b/lib/src/dart_observable/observables/observation.dart
@@ -0,0 +1,22 @@
+
+import 'package:disposal/disposal.dart';
+import 'package:meta/meta.dart';
+
+import '../observers/observer.dart';
+
+@internal
+abstract class Observation<T> implements Disposable {
+
+  Observation({
+    required this.onData,
+  }) {
+    init();
+  }
+
+  @internal
+  final OnData<T> onData;
+
+  @internal
+  @mustCallSuper
+  void init();
+}
\ No newline at end of file