module Sequel::Plugins::ColumnsUpdated::InstanceMethods

def _save(opts)

Unset the updated columns hash before returning from save. 
def _save(opts)
  super
ensure
  @columns_updated = nil
end

def _update_columns(columns_updated)

in the after_hooks.
Store the hash used for updating the record, so it can be accessed 
def _update_columns(columns_updated)
  @columns_updated = columns_updated
  super
end