class AliHistogramCollection: public TNamed

 Ctor

 dtor. Note that the map is owner

 Adopt a given histogram at top level (i.e. no key)

 Adopt a given histogram, and associate it with pair (keyA)

 Adopt a given histogram, and associate it with pair (keyA,keyB)

 Adopt a given histogram, and associate it with pair (keyA,keyB,keyC)

 Adopt a given histogram, and associate it with pair (keyA,keyB,keyC,keyD)

 clear pending messages

 Create an iterator (must be deleted by the client)

 Clone this collection.
 We loose the messages.

 Delete all the histograms

 Find an object by its full identifier.

 Find an object

 Convert this into a mergeable collection so it can receive objects
 that are not histograms

 Create list of keys at level "A" (/A/B/C/D/histoname)
 Must be delete by client

 Create list of keys at level "B" (/A/B/C/D/histoname)
 Must be delete by client

 Create list of keys at level "C" (/A/B/C/D/histoname)
 Must be delete by client

 Create list of keys at level "D" (/A/B/C/D/histoname)
 Must be delete by client

 Create list of histogram names for /keyA/keyB/keyC/KeyD
 Returned list must be deleted by client

 Create the list of keys at level index

 Get histo for (keyA,histoname) triplet

 Get histo for (keyA,keyB,histoname) triplet

 Get histo for (keyA,keyB,keyC,histoname) quad

 Get histo for (keyA,keyB,keyC,histoname) quad

 Extract the histogram name from an identifier

 Adopt an histogram

 Get histogram keyA/keyB/keyC/keyD/histoname:action

 Extract the index-th element of the identifier (/keyA/keyB/keyC/keyD/histoname)
 keyA is index=0
 keyB is index=1
 keyC is index=2
 keyD is index=3
 histo is index=-1 (i.e. last)

 Get histo for (identifier,histoname)

 Extract the first element of the key pair from an identifier

 Extract the second element (if present)

 Extract the 3rd element (if present)

 Extract the 4th element (if present)

 Wrapper to insure proper key formats (i.e. new vs old)

 Merge a list of AliHistogramCollection objects with this
 Returns the number of merged objects (including this).

 Replace / by _ to build a root-compliant histo name

 Get the number of histograms we hold

 Get the number of keys we have

 Print all the histograms we hold, in a hopefully visually pleasing
 way.

 Option can be used to select given part only, using the schema :
 /*/*/*/*/*
 Where the stars are wilcards for /keyA/keyB/keyC/KeyD/histoname

 if * is used it is assumed to be a wildcard for histoname

 For other selections the full syntax /*/*/*/*/* must be used.

 Use "-" as histoname to disable histogram's name output

 Print pending messages

 Estimate the memory (in bytes) used by our histograms

 Delete the empty histograms

 Create a new collection starting at keyA/keyB/keyC/keyD
 Histograms are *copied*

 Remove a given histogram (given its key=full identifier=/keyA/keyB/keyC/keyD/histoname)

 Note that we do *not* remove the /keyA/keyB/keyC/keyD entry even if there's no
 more histogram for this triplet.

 Not very efficient. Could be improved ?

 shameless copy from TProofPlayerRemote::HistoSameAxis

 Return kTRUE is the histograms 'h0' and 'h1' have the same binning and ranges
 on the axis (i.e. if they can be just Add-ed for merging).

 Sort our internal identifiers. Returned array must be deleted.

 Turn on the display of empty histograms for the Print method