code: public static DataTable createBasicInstance(String firstColumn, String... otherColumns) {
  		List<String> list = new ArrayList<String>();
  		list.add(firstColumn);
  		list.addAll(Arrays.asList(otherColumns));
  		return createBasicInstance(list);
  	}
docs: Creates a new instance with the given column setup. At least one column
  must be specified in the table. Rows are allowed to be empty.
  <p>
  Columns should be unique, but the table doesn't enforce this.
  
  @param firstColumn first column
  @param otherColumns additional, optional columns
  @return basic instance