docs: private void _createZeroArgsMethodExpression(MethodExpression methodExpression)
      {
          ExpressionFactory expressionFactory = getFacesContext().getApplication().getExpressionFactory();
  
          this.methodExpressionZeroArg = expressionFactory.createMethodExpression(getElContext(), 
                    methodExpression.getExpressionString(), Void.class, EMPTY_CLASS_ARRAY);
      }