QgsTransaction.create expects layers, not ids

doc/api_break.dox

@@ -2426,6 +2426,11 @@ QgsTracer        {#qgis_api_break_3_0_QgsTracer}
 
 - hasCrsTransformEnabled() and setCrsTransformEnabled() were removed. CRS transformation is now always enabled when required.
 
+QgsTransaction        {#qgis_api_break_3_0_QgsTransaction}
+--------------
+
+- `createTransaction()` takes a set of map layers instead of a layer ids
+
 
 QgsTreeWidgetItem        {#qgis_api_break_3_0_QgsTreeWidgetItem}
 -----------------

tests/src/python/test_qgsrelationeditwidget.py

@@ -233,7 +233,7 @@ def startTransaction(self):
         """
         lyrs = [self.vl_a, self.vl_b, self.vl_link]
 
-        self.transaction = QgsTransaction.create([l.id() for l in lyrs])
+        self.transaction = QgsTransaction.create(lyrs)
         self.transaction.begin()
         for l in lyrs:
             l.startEditing()