It is really hard for me to guess your intention. On 1 hand you are declaring that equally a and b are public (no main underscore inside their names) so I should theoretically be allowed to access/mutate (get/established) each. But then you specify an specific mutator just for a, which https://smartworlddeveloper.co.in/smart-world-69-sector-69-gurgaon-a-new-benchmark-in-urban-luxury-living/