Stubs for respecting pushbak facade being interface

Author: IoannisPanagiotas

procedures/pushback-procedures-facade/src/main/java/org/neo4j/gds/procedures/algorithms/pathfinding/PushbackPathFindingProcedureFacade.java

@@ -269,21 +269,53 @@ public Stream<MaxFlowMutateResult> maxFlowMutate(String graphName, Map<String, O
         return mutateProcedureFacade.maxFlow(graphName, configuration);
     }
 
+    @Override
+    public Stream<MemoryEstimateResult> maxFlowMutateEstimate(
+        Object graphNameOrConfiguration,
+        Map<String, Object> algorithmConfiguration
+    ) {
+        return Stream.empty();
+    }
+
     @Override
     public Stream<MaxFlowStreamResult> maxFlowStream(String graphName, Map<String, Object> configuration) {
         return streamProcedureFacade.maxFlow(graphName, configuration);
     }
 
+    @Override
+    public Stream<MemoryEstimateResult> maxFlowStreamEstimate(
+        Object graphNameOrConfiguration,
+        Map<String, Object> algorithmConfiguration
+    ) {
+        return Stream.empty();
+    }
+
     @Override
     public Stream<MaxFlowStatsResult> maxFlowStats(String graphName, Map<String, Object> configuration) {
         return statsProcedureFacade.maxFlow(graphName, configuration);
     }
 
+    @Override
+    public Stream<MemoryEstimateResult> maxFlowStatsEstimate(
+        Object graphNameOrConfiguration,
+        Map<String, Object> algorithmConfiguration
+    ) {
+        return Stream.empty();
+    }
+
     @Override
     public Stream<MaxFlowWriteResult> maxFlowWrite(String graphName, Map<String, Object> configuration) {
         return writeProcedureFacade.maxFlow(graphName, configuration);
     }
 
+    @Override
+    public Stream<MemoryEstimateResult> maxFlowWriteEstimate(
+        Object graphNameOrConfiguration,
+        Map<String, Object> algorithmConfiguration
+    ) {
+        return Stream.empty();
+    }
+
     @Override
     public Stream<SpanningTreeStreamResult> prizeCollectingSteinerTreeStream(
         String graphName,