"""Add/del NAT44 address range
:param first_ip_address: First IP address
:param last_ip_address: Last IP address
:param vrf_id: VRF id for the address range
"""Add/del NAT44 address range
:param first_ip_address: First IP address
:param last_ip_address: Last IP address
:param vrf_id: VRF id for the address range