open and close methods of the ModalService

In the documentation, the open and close Methods are wrongly defined
following is the correct usage of these methods

(click)="modal.open('my-modal')" // to open the modal 

<sj-modal id="my-modal">
    <div>
        HI
    </div>
    <button (click)="modal.close('my-modal')">Close </button>   // to close the modal
</sj-modal>