# File lib/mongo/collection/view/builder/flags.rb, line 49
          def map_flags(options)
            MAPPINGS.each.reduce(options[:flags] || []) do |flags, (key, value)|
              cursor_type = options[:cursor_type]
              if options[key] || (cursor_type && cursor_type == key)
                flags.push(*value)
              end
              flags
            end
          end