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this._addElement("shape",e,t,n)},ke.prototype.addConnection=function(e,t,n){return this._addElement("connection",e,t,n)},ke.prototype._removeElement=function(e,t){var n=this._elementRegistry,i=this._graphicsFactory,r=this._eventBus;if(e=n.get(e.id||e))return r.fire(t+".remove",{element:e}),i.remove(e),oo.remove(e.parent&&e.parent.children,e),e.parent=null,r.fire(t+".removed",{element:e}),n.remove(e),e},ke.prototype.removeShape=function(e){return this._removeElement(e,"shape")},ke.prototype.removeConnection=function(e){return this._removeElement(e,"connection")},ke.prototype.getGraphics=function(e,t){return this._elementRegistry.getGraphics(e,t)},ke.prototype._changeViewbox=function(e){this._eventBus.fire("canvas.viewbox.changing"),e.apply(this),this._cachedViewbox=null,this._viewboxChanged()},ke.prototype._viewboxChanged=function(){this._eventBus.fire("canvas.viewbox.changed",{viewbox:this.viewbox()})},ke.prototype.viewbox=function(e){if(void 0===e&&this._cachedViewbox)return this._cachedViewbox;var t,n,i,r,a,o=this._viewport,s=this.getSize();if(!e){t=this.getDefaultLayer().getBBox();var l=mn(o);return n=l?l.matrix:vo(),i=Re(n.a,1e3),r=Re(-n.e||0,1e3),a=Re(-n.f||0,1e3),e=this._cachedViewbox={x:r?r/i:0,y:a?a/i:0,width:s.width/i,height:s.height/i,scale:i,inner:{width:t.width,height:t.height,x:t.x,y:t.y},outer:s}}return this._changeViewbox(function(){i=Math.min(s.width/e.width,s.height/e.height);var t=this._svg.createSVGMatrix().scale(i).translate(-e.x,-e.y);mn(o,t)}),e},ke.prototype.scroll=function(e){var t=this._viewport,n=t.getCTM();return e&&this._changeViewbox(function(){e=di({dx:0,dy:0},e||{}),n=this._svg.createSVGMatrix().translate(e.dx,e.dy).multiply(n),Te(t,n)}),{x:n.e,y:n.f}},ke.prototype.zoom=function(e,t){if(!e)return this.viewbox(e).scale;if("fit-viewport"===e)return this._fitViewport(t);var n,i;return this._changeViewbox(function(){"object"!=typeof 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