--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/Grids/timedependent.jl	Wed Jul 26 22:50:58 2023 +0200
@@ -0,0 +1,24 @@
+IsTimedependent(::Type{<:Any}) = Val(false)
+IsTimedependent(f) = IsTimedependent(typeof(f))
+
+## If IsTimedependent is true the type should support the function `wrapped_value`
+
+struct Timedependent{T}
+    a::T
+end
+
+wrapped_value(a::Timedependent) = a.a
+IsTimedependent(::Type{<:Timedependent}) = Val(true)
+
+(tf::Timedependent)(x...) = tf.f(x...)
+
+
+eval_on(g, f) = eval_on(g, f, IsTimedependent(f))
+
+function eval_on(g,f,::Val{false})
+    ## Same as current
+end
+
+function eval_on(g,f,::Val{true})
+    return t->eval_on(g, x̄->wrapped_value(f)(t,x̄))
+end