code: protected Void modifyColumns(TableName tableName, String columnName,
        String modificationType, ModifyTableBuilder builder) throws IOException {
      try {
        tableAdminClientWrapper.modifyFamilies(builder.build());
        return null;
      } catch (Throwable throwable) {
        throw new IOException(
            String.format(
                "Failed to %s column '%s' in table '%s'",
                modificationType,
                columnName,
                tableName.getNameAsString()),
            throwable);
      }
    }
docs: <p>modifyColumns.</p>
  
  @param tableName a {@link TableName} object for error messages.
  @param columnName a {@link String} object for error messages
  @param modificationType a {@link String} object for error messages
  @param builder a {@link ModifyTableBuilder} object to send.
  @throws java.io.IOException if any.