jaas/modules/src/main/java/org/apache/karaf/jaas/modules/properties/PropertiesBackingEngine.java [137:158]:
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    private List<RolePrincipal> listRoles(String name) {

        List<RolePrincipal> result = new ArrayList<>();
        String userInfo = users.get(name);
        String[] infos = userInfo.split(",");
        for (int i = 1; i < infos.length; i++) {
            String roleName = infos[i];
            if (roleName.startsWith(GROUP_PREFIX)) {
                for (RolePrincipal rp : listRoles(roleName)) {
                    if (!result.contains(rp)) {
                        result.add(rp);
                    }
                }
            } else {
                RolePrincipal rp = new RolePrincipal(roleName);
                if (!result.contains(rp)) {
                    result.add(rp);
                }
            }
        }
        return result;
    }
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jaas/modules/src/main/java/org/apache/karaf/jaas/modules/publickey/PublickeyBackingEngine.java [130:151]:
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    private List<RolePrincipal> listRoles(String name) {

        List<RolePrincipal> result = new ArrayList<>();
        String userInfo = users.get(name);
        String[] infos = userInfo.split(",");
        for (int i = 1; i < infos.length; i++) {
            String roleName = infos[i];
            if (roleName.startsWith(GROUP_PREFIX)) {
                for (RolePrincipal rp : listRoles(roleName)) {
                    if (!result.contains(rp)) {
                        result.add(rp);
                    }
                }
            } else {
                RolePrincipal rp = new RolePrincipal(roleName);
                if (!result.contains(rp)) {
                    result.add(rp);
                }
            }
        }
        return result;
    }
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