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Description
This was surfaced in https://discourse.julialang.org/t/how-do-i-precompile-a-callable-struct/115037/5, this package is assuming that only subtypes of Base.Callable
have methods, but that's not true.
julia> struct Foo end
julia> (::Foo)() = 1
julia> Foo()()
1
julia> Foo() isa Base.Callable
false
julia> methodinstances((Foo(),))
Core.MethodInstance[]
versus
julia> struct Bar <: Function end
julia> (::Bar)() = 1
julia> Bar()()
1
julia> methodinstances((Bar(),))
1-element Vector{Core.MethodInstance}:
MethodInstance for (::Bar)()
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