Tests whether this map contains the given key.
Returns a new empty list.
Retrieves the n-th value registered for an key or null if there was no such key
in the list. An inde
Returns all registered keys as an enumeration.
Inserts a new key/value pair into the map. If such a pair already exists, it
gets replaced with the
Adds a new key/value pair into this map. If the key is not yet in the map, it
gets added to the map
Returns an iterator over all elements registered to the given key.
Returns all registered keys as set.
Returns the contents for the given key as object array. If there were no objects
registered with tha