def find(no)
            load! if @xrefs.nil?

            ranges = object_ranges

            index = 0
            ranges.each do |range|
                return @xrefs[index + no - range.begin] if range.cover?(no)

                index += range.size
            end

            nil
        end
def find(no)
            load! if @xrefs.nil?

            ranges = object_ranges

            index = 0
            ranges.each do |range|
                return @xrefs[index + no - range.begin] if range.cover?(no)

                index += range.size
            end

            nil
        end
Returns an XRef matching this object number.