function isWeakSet(value) {
      return isObjectLike(value) && baseGetTag(value) == weakSetTag;
    }
Checks if `value` is classified as a `WeakSet` object.

@static
@memberOf _
@since 4.3.0
@category Lang
@param {*} value The value to check.
@returns {boolean} Returns `true` if `value` is a weak set, else `false`.
@example

_.isWeakSet(new WeakSet);
// => true

_.isWeakSet(new Set);
// => false