start_columns (PDF::Writer)

          # File lib/pdf/writer.rb, line 1910
    1910:   def start_columns(size = 2, gutter = 10)
    1911:       # Start from the current y-position; make the set number of columns.
    1912:     return false if @columns_on
    1913:
    1914:     @columns = {
    1915:       :current => 1,
    1916:       :bot_y   => @y
    1917:     }
    1918:     @columns_on = true
    1919:       # store the current margins
    1920:     @columns[:left]   = @left_margin
    1921:     @columns[:right]  = @right_margin
    1922:     @columns[:top]    = @top_margin
    1923:     @columns[:bottom] = @bottom_margin
    1924:       # Reset the margins to suit the new columns. Safe enough to assume the
    1925:       # first column here, but start from the current y-position.
    1926:     @top_margin = @page_height - @y
    1927:     @columns[:size]   = size   || 2
    1928:     @columns[:gutter] = gutter || 10
    1929:     w = absolute_right_margin - absolute_left_margin
    1930:     @columns[:width] = (w - ((size - 1) * gutter)) / size.to_f
    1931:     @right_margin = @page_width - (@left_margin + @columns[:width])
    1932:   end