base := r.h.Offsets[BlkData]
	off := r.uint32At(dataIdxOff)
	end := r.uint32At(dataIdxOff + 4)
	return r.StringAt(base+off, end-off)
}

// NRefName returns the number of referenced symbol names.
func (r *Reader) NRefName() int {
	return int(r.h.Offsets[BlkRefName+1]-r.h.Offsets[BlkRefName]) / RefNameSize
}

// RefName returns a pointer to the i-th referenced symbol name.