# File lib/bio/graphics/track.rb, line 121
  def get_rows
    current_row = 1
    @feature_rows = Array.new(@features.length,1)
    @features.each_with_index  do |f1, i|
      @features.each_with_index do |f2, j|
        next if i == j or j <= i
        if overlaps(f1,f2)
          @feature_rows[i] += 1
        end
      end
      @number_rows = @feature_rows.max
    end
  end