It's Tricky for me to guess your intention. On just one hand you're expressing that each a and b are community (no leading underscore within their names) so I should really theoretically be allowed to access/mutate (get/established) each. But Then you definitely specify an specific mutator just for a, which https://affordablehousinggurugram.in/aipl-lake-city-sector-103-gurgaon-a-new-chapter-in-urban-luxury-living/