API IsEquippableItem

__NOTOC__
Returns true if an item is equipable by the player.
 result = IsEquippableItem(itemId or itemName or itemLink)
==Parameters==
===Arguments===
:(itemId or "itemName" or "itemLink")
:;itemId: - The numeric ID of the item. ie. 12345
:;itemName: - The Name of the Item, e.g. "Heavy Silk Bandage"
:;itemLink: - The itemLink, when Shift-Clicking items.
===Returns===
:;result:1 if equip-able, nil otherwise.
==Example==
On a Druid:
 /dump IsEquippableItem("")
 1
 /dump IsEquippableItem("")
 1
 /dump IsEquippableItem("")
 nil