It would be better to add usages to avoid function name conflicts to the documentation.
julia> using Antique: V as potential, E as energy, ψ as wavefuntion, HydrogenAtom
julia> H = HydrogenAtom()
HydrogenAtom(1, 1.0, 1.0, 1.0, 1.0)
julia> energy(H)
-0.5
It would be better to add usages to avoid function name conflicts to the documentation.