pub fn await(a: Promise(a), b: fn(a) -> Promise(b)) -> Promise(b)

pub fn await2(a: Promise(a), b: Promise(b)) -> Promise(#(a, b))

pub fn await3(a: Promise(a), b: Promise(b), c: Promise(c)) -> Promise(
  #(a, b, c),
)

pub fn await4(a: Promise(a), b: Promise(b), c: Promise(c), d: Promise(
    d,
  )) -> Promise(#(a, b, c, d))

pub fn await5(a: Promise(a), b: Promise(b), c: Promise(c), d: Promise(
    d,
  ), e: Promise(e)) -> Promise(#(a, b, c, d, e))

pub fn await6(a: Promise(a), b: Promise(b), c: Promise(c), d: Promise(
    d,
  ), e: Promise(e), f: Promise(f)) -> Promise(#(a, b, c, d, e, f))

pub fn await_array(a: Array(Promise(a))) -> Promise(Array(a))

pub fn await_list(xs: List(Promise(a))) -> Promise(List(a))

pub fn map(a: Promise(a), b: fn(a) -> b) -> Promise(b)

pub fn map_try(promise: Promise(Result(a, b)), callback: fn(a) ->
    Result(c, b)) -> Promise(Result(c, b))

pub fn rescue(a: Promise(a), b: fn(Dynamic) -> a) -> Promise(a)

pub fn resolve(a: a) -> Promise(a)

pub fn tap(promise: Promise(a), callback: fn(a) -> b) -> Promise(
  a,
)

pub fn try_await(promise: Promise(Result(a, b)), callback: fn(a) ->
    Promise(Result(c, b))) -> Promise(Result(c, b))