Returns all the name-value pairs of attributes contained by the element with the given route. 
      Syntax
         
         
            public 
            Map< String, String >  
            getChildAttributeMap
            (
            String... 
            route
            )
         
      
      Parameters
         
         
            - 
               route – 
               The route to the element with the child attributes
            
Returns
         The list of values
      Exceptions
         
         
            - 
               IllegalArgumentException – 
               if the argument is null.