diff --git a/bindings/Sofa/src/SofaPython3/Sofa/Core/Binding_Base.cpp b/bindings/Sofa/src/SofaPython3/Sofa/Core/Binding_Base.cpp
index 90641297..c7894df9 100644
--- a/bindings/Sofa/src/SofaPython3/Sofa/Core/Binding_Base.cpp
+++ b/bindings/Sofa/src/SofaPython3/Sofa/Core/Binding_Base.cpp
@@ -477,7 +477,7 @@ void moduleAddBase(py::module &m)
     base.def("getDefinitionSourceFilePos", &Base::getDefinitionSourceFilePos, sofapython3::doc::base::getDefinitionSourceFilePos);
     base.def("getDefinitionSourceFileName", &Base::getDefinitionSourceFileName, sofapython3::doc::base::getDefinitionSourceFileName);
     base.def("getInstanciationSourceFilePos", &Base::getInstanciationSourceFilePos, sofapython3::doc::base::getInstanciationSourceFilePos);
-    base.def("getInstanciationFileName", &Base::getInstanciationSourceFileName, sofapython3::doc::base::getInstanciationSourceFilePos);
+    base.def("getInstanciationSourceFileName", &Base::getInstanciationSourceFileName, sofapython3::doc::base::getInstanciationSourceFileName);
 
     base.def("setDefinitionSourceFilePos", &Base::setDefinitionSourceFilePos, sofapython3::doc::base::setDefinitionSourceFilePos);
     base.def("setDefinitionSourceFileName", &Base::setDefinitionSourceFileName, sofapython3::doc::base::setDefinitionSourceFileName);
diff --git a/bindings/Sofa/src/SofaPython3/Sofa/Core/Binding_BaseObject.cpp b/bindings/Sofa/src/SofaPython3/Sofa/Core/Binding_BaseObject.cpp
index 6740de72..2b25bf39 100644
--- a/bindings/Sofa/src/SofaPython3/Sofa/Core/Binding_BaseObject.cpp
+++ b/bindings/Sofa/src/SofaPython3/Sofa/Core/Binding_BaseObject.cpp
@@ -56,6 +56,7 @@
 #include <sofa/core/CategoryLibrary.h>
 #include <pybind11/stl.h>
 
+#include <sofa/simulation/Node.h>
 /// Makes an alias for the pybind11 namespace to increase readability.
 namespace py { using namespace pybind11; }
 
@@ -99,11 +100,20 @@ py::list getSlaves(BaseObject &self)
    return slaveList;
 }
 
-py::object getContext(const BaseObject &self)
+py::object getContext(BaseObject &self)
 {
-    const sofa::core::objectmodel::BaseContext* context =  self.getContext();
+    sofa::core::objectmodel::BaseContext* context =  self.getContext();
     if (context){
-        return PythonFactory::toPython(const_cast<sofa::core::objectmodel::BaseContext*>(context));
+        return PythonFactory::toPython(context);
+    }
+    return py::none();
+}
+
+py::object getOwner(BaseObject &self)
+{
+    sofa::simulation::Node* node = dynamic_cast<sofa::simulation::Node*>(self.getContext());
+    if (node){
+        return PythonFactory::toPython(node);
     }
     return py::none();
 }
@@ -218,6 +228,7 @@ void moduleAddBaseObject(py::module& m)
     p.def("getLinkPath", [](const BaseObject &self){ return std::string("@") + self.getPathName(); }, sofapython3::doc::baseObject::getLink);
     p.def("getSlaves", getSlaves, sofapython3::doc::baseObject::getSlaves);
     p.def("getContext", getContext, sofapython3::doc::baseObject::getContext);
+    p.def("getOwner", getOwner);
     p.def("getMaster", getMaster, sofapython3::doc::baseObject::getMaster);
     p.def("addSlave", &BaseObject::addSlave, sofapython3::doc::baseObject::addSlave);
     p.def("storeResetState", &BaseObject::storeResetState, sofapython3::doc::baseObject::storeResetState);
diff --git a/examples/modifier-exp/test1.py b/examples/modifier-exp/test1.py
new file mode 100644
index 00000000..2e62d0de
--- /dev/null
+++ b/examples/modifier-exp/test1.py
@@ -0,0 +1,233 @@
+import Sofa
+
+## Pyggy patch ##############################################################
+class Parameters(object):
+    name : str = ""
+    def __init__(self, **kwargs):
+        for k,v in kwargs.items():
+            setattr(self, k, v)
+
+    def toDict(self):
+        return {"name":self.name}
+
+class ModifierParameters(Parameters):
+    def __init__(self, **kwargs):
+        Parameters.__init__(self, **kwargs)
+
+    def toDict(self):
+        return Parameters.toDict(self) 
+
+def getpythonCallingPoint(depth=0):
+    import inspect
+    d = inspect.stack()[depth]
+    return (d.filename, d.positions.lineno)
+
+class Modifier(Sofa.Core.Controller):
+    def __init__(self, parameters : ModifierParameters = ModifierParameters()):
+        Sofa.Core.Controller.__init__(self, **parameters.toDict())         
+
+    def getModifiedNode(self):
+        return self.getOwner().parents[0]
+    
+Sofa.Core.Modifier = Modifier
+
+def addModifier(self, type, parameters:Parameters, **kwargs) -> Modifier:
+    if "Modifiers" not in self.children:
+        self.addChild("Modifiers")
+    o = self.Modifiers.addObject(type(parameters=parameters, **kwargs))
+    o.apply()
+    return o
+Sofa.Core.Node.addModifier = addModifier 
+
+def add(self, type, parameters:Parameters) -> Sofa.Core.Base:
+    if issubclass(type, Sofa.Core.Node):
+        return self.addChild(type(parameters)) 
+Sofa.Core.Node.add = add    
+
+#############################################################################
+class PrefabParameters(Parameters):
+    def __init__(self, **kwargs):
+        Parameters.__init__(self, **kwargs)
+
+    def toDict(self):
+        return Parameters.toDict(self) 
+
+class Prefab(Sofa.Core.Node):
+    def __init__(self, parameters):
+        Sofa.Core.Node.__init__(self, name=parameters.name)
+
+class MyEntityParameters(PrefabParameters):
+    def __init__(self, **kwargs):
+        PrefabParameters.__init__(self, **kwargs)
+
+    def toDict(self):
+        return PrefabParameters.toDict(self) 
+
+class MyEntity(Prefab):
+    def __init__(self, parameters):
+        Prefab.__init__(self, PrefabParameters(name=parameters.name))
+
+        self.addChild("Material")
+        self.addChild("Geometry")
+        self.addChild("Collision")
+        self.addChild("Visual")
+        self.addChild("Modifiers")
+
+        self.Geometry.addObject("MeshOBJLoader", filename="mesh/cube.obj", name="loader")
+
+        self.Material.addObject("MechanicalObject", name="state", template="Vec3", position=self.Geometry.loader.position.linkpath)
+        self.Material.addObject("UniformMass", name="mass", totalMass=1.0)
+
+        self.Visual.addObject("OglModel", src=self.Geometry.loader.linkpath)
+
+
+class FixedPointBoundaryConditionParameters(ModifierParameters):
+    def __init__(self, **kwargs):
+        ModifierParameters.__init__(self, **kwargs)
+
+    def toDict(self):
+        return ModifierParameters.toDict(self) 
+
+class FixedPointBoundaryCondition(Modifier):
+    def __init__(self, parameters : FixedPointBoundaryConditionParameters = FixedPointBoundaryConditionParameters()):
+        Modifier.__init__(self, parameters=parameters)
+    
+    def apply(self):
+        self.getModifiedNode().Material.addObject("UnilateralInteractionConstraint")
+
+class BilateralInteractionModifierParameters(ModifierParameters):
+    object1: Sofa.Core.Object = None
+    object2: Sofa.Core.Object = None
+      
+    def __init__(self, **kwargs):
+        ModifierParameters.__init__(self, **kwargs)
+
+    def toDict(self):
+        return ModifierParameters.toDict(self) | {"object1":self.object1,"object2":self.object2}
+
+class BilateralInteractionModifier(Modifier):
+    def __init__(self, parameters : BilateralInteractionModifierParameters = BilateralInteractionModifierParameters()):
+        Modifier.__init__(self, parameters=parameters)
+
+        self.object1 = parameters.object1
+        self.object2 = parameters.object2        
+
+        if self.object1 is None:
+            raise Exception("It is mandatory to have 'object1'")
+        
+        if self.object2 is None:
+            raise Exception("It is mandatory to have 'object2'")
+
+        h = getpythonCallingPoint(3)
+        self.setInstanciationSourceFileName(h[0])
+        self.setInstanciationSourceFilePos(h[1])
+
+    def apply(self):
+        a = self.object1.Material.addObject("UnilateralInteractionConstraint")
+        b = self.object2.Material.addObject("UnilateralInteractionConstraint")
+
+        a.setInstanciationSourceFileName(self.getInstanciationSourceFileName())
+        a.setInstanciationSourceFilePos(self.getInstanciationSourceFilePos())
+
+        b.setInstanciationSourceFileName(self.getInstanciationSourceFileName())
+        b.setInstanciationSourceFilePos(self.getInstanciationSourceFilePos())
+
+class HeaderFromSceneModifierParameters(ModifierParameters):
+    root : Sofa.Core.Node = None
+
+    def __init__(self, **kwargs):
+        ModifierParameters.__init__(self, **kwargs)
+        
+    def toDict(self):
+        return ModifierParameters.toDict(self) | {"root":self.root}
+
+def find_component(cond, node):
+    c = [component for component in node.objects if cond(component)]
+    for child in node.children:
+        c += find_component(cond, child)
+    return c
+
+class HeaderFromSceneModifier(Modifier):
+    def __init__(self, parameters : HeaderFromSceneModifierParameters = HeaderFromSceneModifierParameters()):
+        Modifier.__init__(self, parameters=parameters)
+        self.root = parameters.root
+        
+        if self.root is None:
+            raise Exception("It is mandatory to have 'root' parameter for this modifier")
+
+        h = getpythonCallingPoint(3)
+        self.setInstanciationSourceFileName(h[0])
+        self.setInstanciationSourceFilePos(h[1])
+
+    def apply(self):
+        # Traverse scene to deduce stuff 
+        constraints = find_component(lambda x: True, self.root)
+        constraints = [constraint.getClassName() for constraint in constraints]
+        print(f"Lagrangian {constraints}")
+        if "UnilateralLagrangianConstraint" in constraints:
+            self.root.addObject("FreeMotionAnimationLoop")
+
+class HeaderToSceneModifierParameters(ModifierParameters):
+    root : Sofa.Core.Node = None
+
+    def __init__(self, **kwargs):
+        ModifierParameters.__init__(self, **kwargs)
+        
+    def toDict(self):
+        return ModifierParameters.toDict(self) | {"root":self.root}
+
+class HeaderToSceneModifier(Modifier):
+    def __init__(self, parameters : HeaderFromSceneModifierParameters = HeaderFromSceneModifierParameters()):
+        Modifier.__init__(self, parameters=parameters)
+
+        self.root = parameters.root
+        
+        if self.root is None:
+            raise Exception("It is mandatory to have 'root' parameter for this modifier")
+        
+    def apply(self):
+        # Traverse scene to deduce stuff 
+
+        def is_mechanical(object):
+            return object.getClassName() == "MechanicalObject"
+
+        mechanicals = find_component(is_mechanical, self.root)
+        for mechanical in mechanicals:
+            mechanical.getOwner().addObject("GenericConstraintCorrection")            
+
+def createScene(root):
+    # Add a modifier in Example1/prefab, it modify the node it is applied to 
+    # The use case is to enrich an object
+    root.addChild("Example1")
+    root.Example1.add(MyEntity, parameters=MyEntityParameters(name="prefab"))
+    root.Example1.prefab.addModifier(FixedPointBoundaryCondition, parameters=FixedPointBoundaryConditionParameters(name="boundary1", stiffness=30.0))
+
+    # Add a modifier in Example2, it modify a specific pair of node
+    # The use case is to explicit an action that involve several possibly disconnected in the graph object
+    # Personnally I'm not sure I want to express BoundaryCondition as Modifiers. 
+    root.addChild("Example2")
+    root.Example2.add(MyEntity, parameters=MyEntityParameters(name="prefab1"))
+    root.Example2.add(MyEntity, parameters=MyEntityParameters(name="prefab2"))
+    root.Example2.addModifier(BilateralInteractionModifier, parameters=BilateralInteractionModifierParameters(name="constraint", 
+                                                                                                              object1=root.Example2.prefab1,
+                                                                                                              object2=root.Example2.prefab2))
+
+    # The same but with the parameters written before calling the modifier 
+    root.addChild("Example2bis")
+    root.Example2bis.add(MyEntity, parameters=MyEntityParameters(name="prefab1"))
+    root.Example2bis.add(MyEntity, parameters=MyEntityParameters(name="prefab2"))
+    parameters = BilateralInteractionModifierParameters()
+    parameters.name="constraint"
+    parameters.object1=root.Example2bis.prefab1
+    parameters.object2=root.Example2bis.prefab2
+    root.Example2bis.addModifier(BilateralInteractionModifier, parameters=parameters)
+
+
+    # Add a modifier in the root node, this modifier deduce something from the scene and modify anywhere in the scene. 
+    root.addModifier(HeaderFromSceneModifier, parameters=HeaderFromSceneModifierParameters(name="bottom-up-fix", 
+                                                                                            root=root))
+
+    # Add a modifier in the root node, this modifier deduce something from the scene and modify top down the scene. 
+    root.addModifier(HeaderToSceneModifier, parameters=HeaderToSceneModifierParameters(name="top-down-fix", 
+                                                                                          root=root))
+