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[matchers]
m = (p.obj in r.sub.roles) && p.act == r.act

request: {name: 'alice', roles: ['data1','b']}, data1, read

you can try it in the editor for acl

i am looking for the same thing, dont want to use batch, found this documantation. https://casbin.org/docs/syntax-for-models#special-grammer