Type-stability with a vector of FunctionWrappers

[ChrisRackauckas]

@DanielVandH

    for i in eachindex(wrappers)
        x, y, t, u = rand(4)
        nums[i] = wrappers[i](x, y, t, u, parameters[i])
    end

You can’t loop and index them like that You’d have to

    map(wrappers,parameters) do f,p
        x, y, t, u = rand(4)
        f(x, y, t, u, p)
    end