@Override
		public int size() {
			int j = 0;
			for (Iterator<Map.Entry<K, V>> i = iterator(); i.hasNext(); i.next()) {
				j++;
			}
			return j;
		}
Removes all mappings from this map.
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/pcodeCPort/utils/WeakHashMap2.java