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#lang typed/racket/base
(provide (all-defined-out))
;; Arity
(define-type Arity (U AtomicArity (Listof (U AtomicArity))))
(define-type AtomicArity (U Natural ArityAtLeast))
(define-struct: ArityAtLeast ([value : Natural])
#:transparent)
(define-predicate AtomicArity? AtomicArity)
(define-predicate listof-atomic-arity? (Listof AtomicArity))
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