Developer's-corner/Boundary-Conditions.md

@@ -67,5 +67,20 @@ You're done.
 
 It's possible to apply any number of boundaries conditions, so instead of replicating common code, make it an independent conditions and call them as needed.  (need details ?)
 
+If you think it would be easier for the user to have a prepackages set of conditions, you can still cluster them[^1]:
+
+```
+FctBoundariesHandler evanescent(EVANESCENT, 
+                                  [](GasDisk& gas, real dt) {
+                                    ComputeReflecting(gas, dt);
+                                    EvanescentBoundaryIn(gas, dt);
+                                    // Radial dumping in the outer region doesn't operate in case of stellar heating
+                                    if(!gas.disk().physic().starRadiation()) {
+                                      EvanescentBoundaryOut(gas, dt);
+                                    }
+                                  });
+```
+
 ### 
 
+[^1]: here, using a lambda expression so that you can show off a bit. You could have used a regular function.