The Fragment class is designed to hold information needed for working with fragment files.

## Slots

path

Path to the fragment file on disk. See https://support.10xgenomics.com/single-cell-atac/software/pipelines/latest/output/fragments

hash

A vector of two md5sums: first element is the md5sum of the fragment file, the second element is the md5sum of the index.

cells

A named vector of cells where each element is the cell barcode as it appears in the fragment file, and the name of each element is the corresponding cell barcode as stored in the ChromatinAssay object.