code: func (e *presentableError) render(c *router.Context) {
  	breadcrumps := []string{}
  	for _, k := range []string{"ProjectID", "JobName", "InvID"} {
  		p := c.Params.ByName(k)
  		if p == "" {
  			break
  		}
  		breadcrumps = append(breadcrumps, p)
  	}
  	c.Writer.Header().Set("Content-Type", "text/html; charset=utf-8")
  	c.Writer.WriteHeader(e.Status)
  	templates.MustRender(c.Context, c.Writer, "pages/error.html", map[string]interface{}{
  		"Breadcrumps":    breadcrumps,
  		"LastCrumbIdx":   len(breadcrumps) - 1,
  		"Message":        e.Message,
  		"ReloginMayHelp": e.ReloginMayHelp,
  	})
  }
docs: // render renders the HTML into the writer and sets the response code.