src/main/java/org/jivesoftware/smack/util/collections/AbstractHashedMap.java
public V remove(Object key) {
        int hashCode = hash((key == null) ? NULL : key);
        int index = hashIndex(hashCode, data.length);
        HashEntry<K, V> entry = data[index];
        HashEntry<K, V> previous = null;
        while (entry != null) {
            if (entry.hashCode == hashCode && isEqualKey(key, entry.getKey())) {
                V oldValue = entry.getValue();
                removeMapping(entry, index, previous);
                return oldValue;
            }
            previous = entry;
            entry = entry.next;
        }
        return null;
    }
public V remove(Object key) {
        int hashCode = hash((key == null) ? NULL : key);
        int index = hashIndex(hashCode, data.length);
        HashEntry<K, V> entry = data[index];
        HashEntry<K, V> previous = null;
        while (entry != null) {
            if (entry.hashCode == hashCode && isEqualKey(key, entry.getKey())) {
                V oldValue = entry.getValue();
                removeMapping(entry, index, previous);
                return oldValue;
            }
            previous = entry;
            entry = entry.next;
        }
        return null;
    }
public V remove ( Object key ) { int hashCode = hash ( ( key == null ) ? NULL : key ) ; int index = hashIndex ( hashCode , data . length ) ; HashEntry < K , V > entry = data [ index ] ; HashEntry < K , V > previous = null ; while ( entry != null ) { if ( entry . hashCode == hashCode && isEqualKey ( key , entry . getKey ( ) ) ) { V oldValue = entry . getValue ( ) ; removeMapping ( entry , index , previous ) ; return oldValue ; } previous = entry ; entry = entry . next ; } return null ; }
Removes the specified mapping from this map.

@param key
the mapping to remove
@return the value mapped to the removed key, null if key not in map
Removes the specified mapping from this map .