docs: public void deleteColumnFamily() {
      System.out.println("\nDelete column family: " + COLUMN_FAMILY_2);
      // [START bigtable_delete_family]
      // Deletes a column family.
      try {
        ModifyColumnFamiliesRequest deleted =
            ModifyColumnFamiliesRequest.of(tableId).dropFamily(COLUMN_FAMILY_2);
        adminClient.modifyFamilies(deleted);
        System.out.printf("Column family %s deleted successfully%n", COLUMN_FAMILY_2);
      } catch (NotFoundException e) {
        System.err.println("Failed to delete a non-existent column family: " + e.getMessage());
      }
      // [END bigtable_delete_family]
    }