code: public static <ColumnSelectorStrategyClass extends ColumnSelectorStrategy> ColumnSelectorPlus<ColumnSelectorStrategyClass> createColumnSelectorPlus(
        ColumnSelectorStrategyFactory<ColumnSelectorStrategyClass> strategyFactory,
        DimensionSpec dimensionSpec,
        ColumnSelectorFactory cursor
    )
    {
      return createColumnSelectorPluses(strategyFactory, ImmutableList.of(dimensionSpec), cursor)[0];
    }
docs: Convenience function equivalent to calling
  {@link #createColumnSelectorPluses(ColumnSelectorStrategyFactory, List, ColumnSelectorFactory)} with a singleton
  list of dimensionSpecs and then retrieving the only element in the returned array.
  
  @param <ColumnSelectorStrategyClass> The strategy type created by the provided strategy factory.
  @param strategyFactory               A factory provided by query engines that generates type-handling strategies
  @param dimensionSpec                 column to generate a ColumnSelectorPlus object for
  @param cursor                        Used to create value selectors for columns.
  
  @return A ColumnSelectorPlus object