Access _validatorDefinitions for my custom item?

[nitroamos]

I'm writing out code for a custom item:

isc.ClassFactory.defineClass("ArrayItem","TextItem");

which is intended to be a container of FormItem objects displayed in a single text field. For example, I want an array of FloatItems. Rather than write my own isFloat validator, is there a safe way I can access:

_validatorDefinitions["isFloat"].condition

for my own purposes? This sketch seems to work:

isc.ArrayItem.addProperties({
   validators: [
      {
         type:"custom",
         condition:function(item,validator,value,record){
            var valid = true;
            for(var i=0; i<value.length; i++){
               for(var v=0; v<item.memberValidators.length; v++){
                  var mv = item.memberValidators[v];
                  valid &= isc.Validator.getValidatorDefinition(mv.type).condition({},mv,value[i]);
               }
            }
            return valid;
         }
      }
   ]
})

which is using non-obfuscated but undocumented code, but it lets me make ArrayItems like this:

{type:"ArrayItem",
 memberValidators:[
     {type:"integerRange", min:1, max:100}
 ]
});

Is there a better approach than what I've outlined?