RooAbsCategory

 Destructor

 Return index number of current state 

 Return label string of current state 

 Recalculate current value and check validity of new result.

 Return iterator over all defined states

 Equality operator with a integer (compares with state index number)

 Equality operator with a string (compares with state label string)

 Check if state with given index is defined

 Check if state with given name is defined

 Define a new state with given name. The lowest available
 integer number is assigned as index value

 Define new state with given name and index number.

 Delete all currently defined states

 Find our type that matches the specified type, or return 0 for no match.

 Find our type corresponding to the specified index, or return 0 for no match.

 Find our type corresponding to the specified label, or return 0 for no match.

 Check if current value is a valid state

 Check if given state is defined for this object

 Create a table matching the shape of this category

 Read object contents from stream (dummy for now)

 Write object contents to stream 

 Print info about this object to the specified stream. In addition to the info
 from RooAbsArg::printToStream() we add:

     Shape : label, index, defined types

 Attach the category index and label to as branches
 to the given TTree. The index field will be attached
 as integer with name <name>_idx, the label field will be attached
 as char[] with label <name>_lbl.

 Attach object to a branch of given TTree

 (De)Activate associate tree branch

 Copy the cached value from given source and raise dirty flag.
 It is the callers responsability to unsure that the sources
 cache is clean before this function is called, e.g. by
 calling syncCache() on the source.

 Return state definition of ordinal nth defined state,
 needed by the generator mechanism.

 Create a RooCategory fundamental object with our properties.

 Determine if category has 2 or 3 states with index values -1,0,1