SQHL34OUQGAAIZ5BFGFROMNVL4QWZM2R6CUBBRIHVIFSCY3MRFSAC
PIEDOKYQWPQIQV3UDNLHZU7BXDPI7YBZ2LOQ2I6MN5JQM2CPPDOAC
BJ5X5O4ACBBJ56LRBBSTCW6IBQP4HAEOOOPNH3SKTA4F66YTOIDAC
sync. Any change to line data should clear line `fragments` and
sync. Any change to line data should clear the derived line property