# File lib/mongo/gridfs/grid_io.rb, line 210
    def gets(separator="\n", length=nil)
      if separator.nil?
        read_all
      elsif separator.is_a?(Integer)
        read_length(separator)
      elsif separator.length > 1
        read_to_string(separator, length)
      else
        read_to_character(separator, length)
      end
    end