def filter = FilterUtil.build {
   and {
      or {
          like "cn", "foo*"
          like "cn", "bar*"
     }
     eq "groupMembership", "cn=admingroup,ou=system,o=mycompany"
   }
}
assert filter instanceof org.springframework.ldap.filter.Filter
assert filter.encode() == "(&(|(cn=foo*)(cn=bar*))(groupMembership=cn=admingroup,ou=system,o=mycompany))"