class AliMergeableCollection: public TFolder

 Ctor

 dtor. Note that the map is owner

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

 Adopt a given object, and associate it with pair key

 Attach an already existing mergeable collection to this one.
 It is attached at level identifier
 We take ownership of mc
 If identifier is already existing we kill it if pruneFirstIfAlreadyExists is kTRUE
 (and attach mc) otherwise we return kFALSE (and do *not* attach mc)

 Create a TFolder structure pointing to our objects, so we
 can be "browsed"

 clear pending messages

 Create an iterator (must be deleted by the client)

 Clone this collection.
 We loose the messages.

 Delete all the objects

 Find an object by its full identifier.

 Find an object

 Create the list of keys at level index

 Create list of object names for /key1/key2/key...
 Returned list must be deleted by client

 Extract the identifier from the fullIdentifier

 Extract the index element of the key pair from the fullIdentifier

 Extract the object name from an identifier

 Get histogram key1/key2/.../objectName:action
 action is used for 2D histograms :
 might be px for projection along x-axis
 py for projection along y-axis
 pfx for profile along x-axis
 pfy for profile along y-axis

 Get histogram key1/key2/.../objectName:action
 action is used for 2D histograms :
 might be px for projection along x-axis
 py for projection along y-axis
 pfx for profile along x-axis
 pfy for profile along y-axis

 Convert o to an histogram if possible, applying a given action if there

 Short-cut method to grab a 2D histogram
 Will return 0x0 if the object if not a TH2xxx

 Short-cut method to grab a 2D histogram
 Will return 0x0 if the object if not a TH2xxx

 Short-cut method to grab a TProfile histogram
 Will return 0x0 if the object if not a TProfile

 Short-cut method to grab a TProfile histogram
 Will return 0x0 if the object if not a TProfile

 Get object key1/key2/.../objectName
 Note that no action is allowed for generic objects (only for histograms,
 see Histo() methods)

 Get object for (identifier,objectName) triplet

 Sum objects
 The pattern must be in the form:
 /key1_1,key1_2,.../key2_1,key2_2,.../.../objectName_1,objectName_2...
 The logical or between patterns separated by commas is taken
 Exact match is required for keys and objectNames

 Adopt an obj

 Extract the index-th element of the identifier (/key1/key2/.../keyN/objectName)
 object is index=-1 (i.e. last)

 Get object for (identifier,objectName)

 Check if object is empty
 (done only for TH1, so far)

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

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

 Add objToAdd to baseObject

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

 Get the number of objects we hold

 Get the number of keys we have

 Print all the objects 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 /key1/key2/.../objectName

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

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

 Use "-" as objectName to disable object's name output

 One might also use /*/*/*/*/:classname syntax to restrict
 output to only those objects matching a given classname pattern

 Print pending messages

 Estimate the memory (in kilobytes) used by some objects

 Delete all objects which match the beginning of the identifier
 returns the number of entries removed from the Map()
 (not to be confused with the number of leaf objects removed)

 Delete the empty objects
 (Implemented for TH1 only)

 To be implemented : would create a new collection starting at /key1/key2/...

 Remove a given object (given its fullIdentifier=/key1/key2/.../objectName)

 Note that we do *not* remove the /key1/key2/... entry even if there's no
 more object for this triplet.

 Not very efficient. Could be improved ?

 Remove all the objects in this collection that are of a given type

 Sort our internal identifiers. Returned array must be deleted.

 Turn on the display of empty objects for the Print method