const Char_t* galicefilename="galice.root");
AliHBTReaderITSv1(TObjArray* dirs,
const Char_t* tracksfilename="itstracks.root",
const Char_t* galicefilename="galice.root");
AliHBTReaderITSv1(TObjArray* dirs,
const Char_t* tracksfilename="itstracks.root",