It is tough for me to guess your intention. On one hand you are stating that the two a and b are public (no top underscore within their names) so I should theoretically be permitted to obtain/mutate (get/established) the two. But then you specify an express mutator only for a, https://smartworlddeveloper.co.in/smart-world-69-sector-69-gurgaon-a-new-benchmark-in-urban-luxury-living/