code: public static Attributes lookupAttributes(LdapOperations ldapOperations, String dn, String attribute) {
          return lookupAttributes(ldapOperations, LdapUtils.newLdapName(dn), attribute);
      }
docs: Lookup all values for the specified attribute, looping through the results incrementally if necessary.
  
  @param ldapOperations The instance to use for performing the actual lookup.
  @param dn             The distinguished name of the object to find.
  @param attribute      name of the attribute to request.
  @return an Attributes instance, populated with all found values for the requested attribute.
  Never <code>null</code>, though the actual attribute may not be set if it was not
  set on the requested object.