Legend.hitTest Method
        
 Determines what legend items are represented at the specified position. This will usually be a single item but could be more than one if items overlap.
 
         
        Parameters
        
            - offsetX
            
 
            - 
                
Type: Number
The position to test in pixels relative to the left edge of the control. 
            - offsetY
            
 
            - 
                
Type: Number
The position to test in pixels relative to the top edge of the control. 
            - target
            
 
            - 
                
Type: HTMLElement
The HTML element located at the position (required). 
        
        Return Value
        
Type: Array
        
ElementType: LegendItem
        
The data control elements represented by the HTML element at the specified position; or null if none.