init_headers

# File lib/csv.rb, line 2180
  def init_headers(options)
    @use_headers    = options.delete(:headers)
    @return_headers = options.delete(:return_headers)
    @write_headers  = options.delete(:write_headers)

    # headers must be delayed until shift(), in case they need a row of content
    @headers = nil

    init_converters(options, :header_converters)
  end