Write a class called MyIterable that will allow you to create an iterable object with the following properties:

it will be possible to add arbitrary elements to it $($add method$)$

an attempt to add an element that is already in the object will be ignored;

it will be possible to check whether an element is present in the object $($has method$)$

it will be possible to delete an element $($del method$)$

it will be possible to check the number of elements $($length property$)$

it will be possible to use any technique for passing elements of an iterable object $($spread operator, for $...$ of$,$ iterators$),$ and an appropriate generator should be used in the implementation.