# File lib/thinking_sphinx/index.rb, line 69
    def options
      all_index_options = config.index_options.clone
      @options.keys.select { |key|
        ThinkingSphinx::Configuration::IndexOptions.include?(key.to_s) ||
        ThinkingSphinx::Configuration::CustomOptions.include?(key.to_s)
      }.each { |key| all_index_options[key.to_sym] = @options[key] }
      all_index_options
    end