It's difficult for me to guess your intention. On 1 hand you're saying that both a and b are public (no major underscore within their names) so I need to theoretically be allowed to obtain/mutate (get/set) the two. But Then you definitely specify an explicit mutator only for a, which https://smartworldeveloper.in/smart-world-69-gurgaon-redefining-urban-luxury-living-in-sector-69/