Update scimlfunctions.jl

Author: ChrisRackauckas

src/scimlfunctions.jl

@@ -2571,19 +2571,23 @@ end
 ######### Backwards Compatibility Overloads
 
 (f::ODEFunction)(args...) = f.f(args...)
-function (f::ODEFunction)(du, u, p, t) 
-    if f.f isa AbstractSciMLOperator
-        f.f(du, u, u, p, t)
-    else
-        f.f(du, u, p, t)
-    end
-end
-function (f::ODEFunction)(u, p, t) 
-    if f.f isa AbstractSciMLOperator
-        f.f(u, u, p, t)
-    else
-        f.f(u, p, t)
-    end
+
+@static if isdefined(SciMLOperators, :isv1)
+  function (f::ODEFunction)(du, u, p, t) 
+      if f.f isa AbstractSciMLOperator
+          f.f(du, u, u, p, t)
+      else
+          f.f(du, u, p, t)
+      end
+  end
+
+  function (f::ODEFunction)(u, p, t) 
+      if f.f isa AbstractSciMLOperator
+          f.f(u, u, p, t)
+      else
+          f.f(u, p, t)
+      end
+  end
 end
 
 (f::NonlinearFunction)(args...) = f.f(args...)