code: public boolean containsValue(final Object value) {
  	return ! forEachPair( 
  		new IntObjectProcedure() {
  			public boolean apply(int iterKey, Object iterValue) {
  				return (value != iterValue);
  			}
  		}
  	);
  }
docs: Returns <tt>true</tt> if the receiver contains the specified value.
  Tests for identity.
  
  @return <tt>true</tt> if the receiver contains the specified value.