in src/rule-unused-fields.js [114:123]
function visitDotAccessCall(node) {
// The `dotAccess` utility accesses nested fields in the form
// `dotAccess(thing, 'field.nestedField')`.
const pathArg = node.arguments[1];
if (isStringNode(pathArg)) {
pathArg.value.split('.').forEach(element => {
foundMemberAccesses[element] = true;
});
}
}