diff --git a/guided_mrmp/conflict_resolvers/subproblems/subproblem_placer.py b/guided_mrmp/conflict_resolvers/subproblems/subproblem_placer.py
index 68811ca8d0e3707f8fe62fda12628070c59b2f48..ffbbaf2ad2d3cf73e35cd4817a3b40ac8393abbf 100644
--- a/guided_mrmp/conflict_resolvers/subproblems/subproblem_placer.py
+++ b/guided_mrmp/conflict_resolvers/subproblems/subproblem_placer.py
@@ -7,7 +7,8 @@ import numpy as np
 
 from guided_mrmp.conflict_resolvers.subproblems.heuristic_placer import HeuristicPlacer
 
-
+class SubproblemPlacer:
+    pass
 
 class DiscreteConflictResolver:
     def __init__(self, grid, conflict, all_robots, all_conflicts):