oak-authorization-cug/src/main/java/org/apache/jackrabbit/oak/spi/security/authorization/cug/impl/EmptyCugTreePermission.java
oak-security-spi/src/main/java/org/apache/jackrabbit/oak/spi/security/authorization/permission/TreePermission.java

oak-authorization-cug/src/main/java/org/apache/jackrabbit/oak/spi/security/authorization/cug/impl/CugPermissionProvider.java
oak-security-spi/src/main/java/org/apache/jackrabbit/oak/spi/security/authorization/permission/EmptyPermissionProvider.java