--- a/src/SbpOperators/readoperator.jl	Sun Jan 24 21:54:42 2021 +0100
+++ b/src/SbpOperators/readoperator.jl	Sun Jan 24 22:15:16 2021 +0100
@@ -47,6 +47,18 @@
     return d2
 end
 
+"""
+    read_stencil_set(fn, filter_pairs::Vararg{Pair})
+
+Picks out a stencil set from the given toml file based on some filters.
+If more than one set matches the filters an error is raised.
+
+"""
+read_stencil_set(fn, filter_pairs::Vararg{Pair}) = get_stencil_set(TOML.parsefile(fn), filter_pairs...)
+
+function get_stencil_set(parsed_toml, filter_pairs::Vararg{Pair})
+
+end
 
 """
     read_stencil(fn, path...; [center])
@@ -133,6 +145,9 @@
     return t
 end
 
+function get_rationals()
+end
+
 # TODO: Probably should be deleted once we have gotten rid of read_D2_operator()
 function toml_string_array_to_tuple(::Type{T}, arr::AbstractVector{String}) where T
     return Tuple(T.(parse_rational.(arr)))