This attribute indicates barrier information for the transaction.
set_bar() sets this attribute to the value passed as argument.
get_bar() returns the value of this attribute.
The default value of this attribute is
This attribute is specific to ACE buses. It is ignored for transactions modeling transfers on the AXI, AHB and APB buses.
The encoding of this attribute value exactly matches the encoding used on the ACE channels AWBAR and ARBAR.