Js.SetBindings to functions in Set
ES6 Set API
let make: unit => t('a);let fromArray: array('a) => t('a);let toArray: t('a) => array('a);let size: t('a) => int;let clear: t('a) => unit;let delete: value:'a => t('a) => bool;let forEach: f:('a => unit) => t('a) => unit;let has: value:'a => t('a) => bool;let values: t('a) => Js.iterator('a);let entries: t('a) => Js.iterator(('a, 'a));