code: public Object apply(Object pValue,
                          Object pContext,
                          Logger pLogger)
              throws ELException {
          // Coerce the value to a boolean
          boolean val = Coercions.coerceToBoolean(pValue, pLogger).booleanValue();
  
          return PrimitiveObjects.getBoolean(!val);
      }
docs: Applies the operator to the given value