CSV::Parser#prepare_skip_lines

# File tmp/rubies/ruby-3.1.3/lib/csv/parser.rb, line 509
def prepare_skip_lines
  skip_lines = @options[:skip_lines]
  case skip_lines
  when String
    @skip_lines = skip_lines.encode(@encoding)
  when Regexp, nil
    @skip_lines = skip_lines
  else
    unless skip_lines.respond_to?(:match)
      message =
        ":skip_lines has to respond to \#match: #{skip_lines.inspect}"
      raise ArgumentError, message
    end
    @skip_lines = skip_lines
  end
end