How to configure a Port Channel on a ASA (Ether channel nexus)

For a failover LAN link

interface GigabitEthernet0/4
 description -- GEC Po1 LAN Failover to FW01 gi0/4
 channel-group 1 mode active
!
interface GigabitEthernet0/5
 description -- GEC Po1 LAN Failover to FW01 gi0/5
 channel-group 1 mode active

interface Port-channel1
 description -- LAN Failover Interface

failover lan interface Failover-Link Port-channel1