True when hiding rows (rows of branch branchId; null is Main) would change a fork: a fork of that
branch whose fork point is at or after the first of them (it inherits them), or a fork placed under one
of them (its SourceDetailID). False for no rows.
True when hiding
rows(rows of branchbranchId; null is Main) would change a fork: a fork of that branch whose fork point is at or after the first of them (it inherits them), or a fork placed under one of them (its SourceDetailID). False for no rows.