It Is challenging for me to guess your intention. On just one hand you are expressing that the two a and b are general public (no leading underscore within their names) so I should really theoretically be permitted to access/mutate (get/established) each. But Then you really specify an explicit mutator https://centralparksector104.co.in/central-park-104-sector-104-gurgaon-a-new-benchmark-in-luxury-living-on-dwarka-expressway/