Performs a deep clone on all the elements in the collection, inserts the new elements after the original elements in the DOM, and adds the new elements to the collection (i.e. it modifies the length of the original collection). repeats is an optional number of times to duplicate the elements (default 1).

In this example, a square is duplicated five times:

var svg = Pablo(demoElement).svg({height:40})
square = svg.rect({width:40, height:40});

square.duplicate(5)
    // Set x position for each element
    .attr('x', function(el, i){
        return i * 50;
    });