This is just bad code example. In a real work case, you will check this.prefix before overriding it. Or better, Only getName with output name+prefix.
There is really no sense making a double setter with only one setter function. Particularly if the setter function name don't explain this.
If you really want to do it in this way, you will add a second argument on the setName with a default Junior value for easy overriding the default.
But again, this problems don't exist in other languages.
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This is just bad code example. In a real work case, you will check this.prefix before overriding it. Or better, Only getName with output name+prefix.
There is really no sense making a double setter with only one setter function. Particularly if the setter function name don't explain this.
If you really want to do it in this way, you will add a second argument on the setName with a default Junior value for easy overriding the default.
But again, this problems don't exist in other languages.