It's Really hard for me to guess your intention. On a single hand you are expressing that each a and b are community (no top underscore in their names) so I really should theoretically be permitted to obtain/mutate (get/set) equally. But You then specify an specific mutator only for a, https://affordablehousinggurugram.in/aipl-lake-city-sector-103-gurgaon-a-new-chapter-in-urban-luxury-living/