class TUnfoldBinning: public TNamed

 initialize variables

 update fFirstBin and fLastBin members of this node and its children
   startWithRootNode: if true, start the update with the root node

 delete all children

 add a binning as last daughter to this tree
   binning: pointer to the new binning
 return value: if succeeded, return "binning"
               otherwise return 0

 print some information about this binning tree
    out: stream to write to
    indent: initial indentation (sub-trees have indent+1)

 parse the tree and return a node with the given name
   name: the name of the node to find

 return root node

 return root node

 get the node which has non-empty distributions
 if there is none or if there are many, return zero

 input:
   axisSteering :
       "pattern1;pattern2;...;patternN"
       patternI = axis[mode]
       axis = name or *
       mode = C|U|O
        C: collapse axis into one bin
        U: discarde underflow bin
        O: discarde overflow bin
 output:
   binMap[] : map global bin numbers to histogram bins
 return value :  number of bins

 locate bin on a one-dimensional distribution
 input
    x: coordinate to locate

 locate bin on a two-dimensional distribution
 input
    x,y: coordinates to locate

 locate bin on a n-dimensional distribution
 input
    x[]: coordinates to locate

 get the name of a bin in the given tree
    iBin: bin number

 get N-dimensional bin size
 input:
    iBin : global bin number
    includeUO : include underflow/overflow bins or not

 return user factor for a bin
    iBin : global bin number

 check whether there are bins but no axis

 return width of the underflow bin
   axis: axis number

 return width of the underflow bin
   axis: axis number

 get global bin number, given axis bin numbers
   axisBins[]: bin numbers on each axis
 return: global bin nmber or -1 if not inside distribution

 setup 

 Navigation 

 Create THxx histograms 

 Calculate global bin number 

 access by bin number, given an axis steering 

 access distribution properties