let foo [arity:1]~a  = (a ()) +. 1.
let a [arity:1]() = 2
let bar = foo ~a
let comparisonResult = compare currentNode.value ~targetValue
;;callback firstNode ~y
;;document.createElementWithOptions {js|div|js}
    (elementProps ~onClick:(fun [arity:1]_ -> Js.log {js|hello world|js}))
;;resolve ()
;;resolve ()