public PackfileEntry(Packfile packfile, PackfileEntryFileData data, string filename, bool isNew)
 {
     Packfile = packfile;
     Data     = data;
     Filename = filename;
     IsNew    = isNew;
 }
 public PackfileEntry(Packfile packfile, PackfileEntryFileData data, string filename) : this(packfile, data, filename, false)
 {
 }