Extract dictionary of a "JD3_ProcResults" object (dictionary())
and extract a specific value (result()) or a list of values
(user_defined()).
Value
the function dictionary() returns a character vector with
the items that can be extracted from object. The result()
function extract an item from the object. The user_defined() function
do the same thing as result() but can also extract several element at
once and encapsulate the items in a user_defined class object.