interpolant defaults to error

Author: sharanry

src/interpolation.jl

@@ -248,7 +248,9 @@ times t (sorted), with values u and derivatives ks
   end
 end
 
-
+@inline function interpolant(Θ,id::AbstractDiffEqInterpolation,dt,y₀,y₁,dy₀,dy₁,idxs,::Type{Val{D}}) where D
+  error("$(string(typeof(id))) for $(D)th order not implemented")
+end
 ##################### Hermite Interpolants
 
 """