# File lib/dm-core/transaction.rb, line 80
    def begin
      unless @state == :none
        raise "Illegal state for begin: #{@state}"
      end

      each_adapter(:connect_adapter, [:log_fatal_transaction_breakage])
      each_adapter(:begin_adapter, [:rollback_and_close_adapter_if_begin, :close_adapter_if_none])
      @state = :begin
    end