 reads the data of a data-entry
 * @throws Error callback doesn&apos;t match
 * @param {Object&lt;containerIndexEntry&gt;} indexEntry
 * @return {Buffer} data
 */
Corrode.addExtension(&apos;containerDataEntry&apos;, function containerDataEntryParser(indexEntry){
    this
        // jump to the offset of the entry
        .position(index.offset)

        // get buffer (it&apos;s a slice, not a copy)
        .buffer(&apos;data&apos;, index.length)

        // check, that the checksum of the data matches the o