@Override
	public boolean containsKey(Object key) {
		return hash.containsKey(key);
	}
Returns <code>true</code> if this map contains a mapping for the
specified key.

@param   key   The key whose presence in this map is to be tested
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/pcodeCPort/utils/WeakHashMap2.java