AliLoader();
AliLoader(const Char_t *detname,const Char_t *eventfoldername); //contructor with name of the top folder of the tree
AliLoader(const Char_t *detname,TFolder* eventfolder);
AliLoader();
AliLoader(const Char_t *detname,const Char_t *eventfoldername); //contructor with name of the top folder of the tree
AliLoader(const Char_t *detname,TFolder* eventfolder);