function done() {
	                count--;
	                if (!count) {
	                    callback && callback();
	                }
	            }
@private
@param {string} path=''
@param {Object} source=this
@param {Object} target
@param {number} [time=500]
@param {number} [delay=0]

@example
 // Animate position
 el._animateToShallow({
     position: [10, 10]
 })

 // Animate shape, style and position in 100ms, delayed 100ms
 el._animateToShallow({
     shape: {
         width: 500
     },
     style: {
         fill: 'red'
     }
     position: [10, 10]
 }, 100, 100)