diff --git a/src/GridGenerator/grid/GridBuilder/LevelGridBuilder.cpp b/src/GridGenerator/grid/GridBuilder/LevelGridBuilder.cpp
index adbf9f1b48fb60463320d05884c88f0b7ff91e95..3ffc8625a265b1e9ec6bbe7746172661cd23601f 100644
--- a/src/GridGenerator/grid/GridBuilder/LevelGridBuilder.cpp
+++ b/src/GridGenerator/grid/GridBuilder/LevelGridBuilder.cpp
@@ -290,6 +290,8 @@ void LevelGridBuilder::getNodeValues(real *xCoords, real *yCoords, real *zCoords
     grids[level]->getNodeValues(xCoords, yCoords, zCoords, neighborX, neighborY, neighborZ, neighborNegative, geo);
 }
 
+//TODO: add getSlipSize...
+
 
 uint LevelGridBuilder::getVelocitySize(int level) const
 {
@@ -301,6 +303,9 @@ uint LevelGridBuilder::getVelocitySize(int level) const
     return size;
 }
 
+//TODO: add getSlipIndices...
+
+
 void LevelGridBuilder::getVelocityValues(real* vx, real* vy, real* vz, int* indices, int level) const
 {
     int allIndicesCounter = 0;
diff --git a/src/GridGenerator/grid/GridBuilder/LevelGridBuilder.h b/src/GridGenerator/grid/GridBuilder/LevelGridBuilder.h
index 64fc74759f173fbd3c6c729739cca129aa3e2d8e..5787b6efafee882b83c2721b6c26754a2d35918a 100644
--- a/src/GridGenerator/grid/GridBuilder/LevelGridBuilder.h
+++ b/src/GridGenerator/grid/GridBuilder/LevelGridBuilder.h
@@ -94,6 +94,10 @@ protected:
         std::vector<SPtr<VelocityBoundaryCondition> > velocityBoundaryConditions;
         std::vector<SPtr<PressureBoundaryCondition> > pressureBoundaryConditions;
 
+		//TODO: add slip BC
+
+
+
         std::vector<SPtr<VelocityBoundaryCondition> > noSlipBoundaryConditions;
 
         SPtr<GeometryBoundaryCondition> geometryBoundaryCondition;