# File lib/brakeman/report/report_html.rb, line 95
  def html_header
    if File.exist? tracker.options[:html_style]
      css = File.read tracker.options[:html_style]
    else
      raise "Cannot find CSS stylesheet for HTML: #{tracker.options[:html_style]}"
    end

    locals = {
      :css => css,
      :tracker => tracker,
      :checks => checks,
      :rails_version => rails_version,
      :brakeman_version => Brakeman::Version
      }

    Brakeman::Report::Renderer.new('header', :locals => locals).render
  end