module Sequel::Plugins::OptimisticLocking::InstanceMethods

   # File lib/sequel/plugins/optimistic_locking.rb
51 def _update_columns(columns)
52   lc = model.lock_column
53   lcv = get_column_value(lc)
54   new_lcv = columns[lc] = lcv + 1
55   super
56   set_column_value("#{lc}=", nil)
57   set_column_value("#{lc}=", new_lcv)
58   changed_columns.delete(lc)
59   nil
60 end