Instanced items can have sockets, which are slots on the item where plugs can be inserted.
Sockets are a bit complex: be sure to examine the documentation on the DestinyInventoryItemDefinition's "socket" block and elsewhere on these objects for more details.
Invocation invocation ) → dynamic
Invoked when a non-existent method or property is accessed.
) → String
Returns a string representation of this object.
dynamic other ) → bool
The equality operator.