ExtentMapUnwrap
ExtentMapUnwrap* extentsWrapped
= new(std::nothrow) ExtentMapUnwrap[noOfExtents];
ArrayDeleter<ExtentMapUnwrap> extentsWrappedDeleter(extentsWrapped);
offset += sizeof(ExtentMapUnwrap);
TreeDirectory::UnWrapExtents(ExtentMapUnwrap* extentsWrapped)
inline status_t UnWrapExtents(ExtentMapUnwrap* extentsWrapped);
offset += sizeof(ExtentMapUnwrap);