- get: (id *)key Return the current item and it's key.
- prev: (id *)key Return the previous item and it's key.
- next: (id *)key Return the next item and it's key.
- (unsigned long)getKeyValue The getKeyValue message returns the integer value associated with the current location of the index. It is exactly like getKey, except the value is returned as an integer. (A common application of this method is to get a Schedule time value associated with an Action in Java.)
- getKey The getKey message returns the key value associated with the current location of the index. It returns nil if the index is not currently positioned at a member.
- setKey:aKey The setKey: messages repositions the index to an entry having a key value that matches its argument. If there is more than one entry matching this key value, the index is positioned to the first entry that matches.
