`canCreate() is not a function` error.

[YevSent]

I have a strange behavior for canCreate() function.
For example, when plugin was initialized - create option is set to false But if later in code change it to true - I get self.canCreate() is not a function error.
I think this error holds because canCreate function is declared only if create setted to true when plugin is initializing.

if (self.settings.create) {
    self.canCreate = function(input) {
        var filter = self.settings.createFilter;
        return input.length
            && (typeof filter !== 'function' || filter.apply(self, [input]))
            && (typeof filter !== 'string' || new RegExp(filter).test(input))
            && (!(filter instanceof RegExp) || filter.test(input));
    };
}

I think, the canCreate() function must be declared always. What do you think about this?