joint.all.js
function(graph, opt) {

        opt = opt || {};

        if (opt.useLocalStorage && this.length === 0 && window.localStorage) {

            this.reset(JSON.parse(localStorage.getItem('joint.ui.Clipboard.cells')));
        }

	graph.trigger('batch:start');

        this.each(function(cell) {

            cell.unset('z');
            if ((cell instanceof joint.dia.Link) && opt.link) {

                cell.set(opt.link);
            }
            
            graph.addCell(cell.toJSON());
        });

	graph.trigger('batch:stop');
    }
function(graph, opt) {

        opt = opt || {};

        if (opt.useLocalStorage && this.length === 0 && window.localStorage) {

            this.reset(JSON.parse(localStorage.getItem('joint.ui.Clipboard.cells')));
        }

	graph.trigger('batch:start');

        this.each(function(cell) {

            cell.unset('z');
            if ((cell instanceof joint.dia.Link) && opt.link) {

                cell.set(opt.link);
            }
            
            graph.addCell(cell.toJSON());
        });

	graph.trigger('batch:stop');
    }
function ( graph , opt ) { opt = opt || { } ; if ( opt . useLocalStorage && this . length === 0 && window . localStorage ) { this . reset ( JSON . parse ( localStorage . getItem ( 'joint.ui.Clipboard.cells' ) ) ) ; } graph . trigger ( 'batch:start' ) ; this . each ( function ( cell ) { cell . unset ( 'z' ) ; if ( ( cell instanceof joint . dia . Link ) && opt . link ) { cell . set ( opt . link ) ; } graph . addCell ( cell . toJSON ( ) ) ; } ) ; graph . trigger ( 'batch:stop' ) ; }
`opt.link` is attributes that will be set all links before they are added to the `graph`. This is useful for e.g. setting `z: -1` for links in order to always put them to the bottom of the paper.
opt . link is attributes that will be set all links before they are added to the graph . This is useful for e . g . setting z : - 1 for links in order to always put them to the bottom of the paper .