You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: writer.rb
    path of file: ./repos/spreadsheet/lib/spreadsheet
    
    the code of the file until where you have to start completion: module Spreadsheet
  ##
  # Parent Class for all Writers. Implements the copying of unmodified
  # Spreadsheet documents.
  class Write
    
    def write workbook
      if @io_or_path.respond_to? :seek
        @io_or_path.binmode
        write_workbook workbook, @io_or_path
      else
        File.open(@io_or_path, "wb+") do |fh|
          write_workbook workbook, fh
        end
      end