--- a/src/SbpOperators/boundaryops/boundary_restriction.jl	Tue May 02 20:14:39 2023 +0200
+++ b/src/SbpOperators/boundaryops/boundary_restriction.jl	Tue May 02 22:09:33 2023 +0200
@@ -1,16 +1,20 @@
 """
-    boundary_restriction(g, closure_stencil::Stencil, boundary)
+    boundary_restriction(g, stencil_set::StencilSet, boundary)
+    boundary_restriction(g::TensorGrid, stencil_set::StencilSet, boundary::TensorGridBoundary)
+    boundary_restriction(g::EquidistantGrid, stencil_set::StencilSet, boundary)
 
 Creates boundary restriction operators `e` as `LazyTensor`s on `boundary`
 
-`e` is the restriction of a grid function to `boundary` using a `Stencil` `closure_stencil`.
-`e'` is the prolongation of a grid function on `boundary` to the whole grid using the same `closure_stencil`.
-On a one-dimensional grid, `e` is a `BoundaryOperator`. On a multi-dimensional grid, `e` is the inflation of
-a `BoundaryOperator`.
+`e` is the restriction of a grid function to `boundary` using the 'e' stencil
+in the guven stencil set. `e'` is the prolongation of a grid function on
+`boundary` to the whole grid using the same stencil. On a one-dimensional
+grid, `e` is a `BoundaryOperator`. On a multi-dimensional grid, `e` is the
+inflation of a `BoundaryOperator`.
 
 See also: [`BoundaryOperator`](@ref), [`LazyTensors.inflate`](@ref).
 """
-#TODO: Check docstring
+function boundary_restriction end
+
 function boundary_restriction(g::TensorGrid, stencil_set::StencilSet, boundary::TensorGridBoundary)
     op = boundary_restriction(g.grids[grid_id(boundary)], stencil_set, boundary_id(boundary))
     return LazyTensors.inflate(op, size(g), grid_id(boundary))