Command line for equipping familiar?

[Sigrdrifa]

I just discovered that you can make a mount equip macro:

/inventory equipmount -8 {mount} {appearance}
/summon_mount

• {mount} is a number... each mount you own has a number based on the order in which you received them, so this part can take some trial and error testing.
• {appearance} is either 0 (no, do not equip in appearance slot) or 1 (yes, equip in appearance slot)

It would be even better if I could do the same thing with a familiar... I use one familiar when crafting, but another for adventuring. Does anyone know if there's a line command for equipping a familiar and the syntax?