A family of function and its arguments as argument of other custom function

General Usage
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7

It will be hard to interface with every function like that. One alternative is to keep the internal interface fixed and use closures:

function foo(distribution::F, x) where {F<:Function}
    y = x + rand(distribution())
end

# call with
x = 2.0
foo(() -> Normal(0,1), x)

Thus, your function expects, always, a function without parameters (or whatever), and interfacing with it is done by defining anonymous functions which adapt to that interface.

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