netplan - multiple switchports

netplan is not allowing multiple switch ports. I want to do the following:

Put the enp3* into one switchport group and enp4* into a second switchport group which I would later in the file map to bridge interfaces. However I receive the error "Error in network definition //etc/netplan/01-netcfg.yaml line 13 column 6: unknown key sw100".

# For more information, see netplan(5).
network:
  version: 2
  renderer: networkd

  ethernets:

    enp0s25:
      dhcp4: false
      dhcp6: false

    switchports:

      sw100:
        match:{name:"enp3*"}
      sw900:
        match:{name:"enp4*"}