code: func (b *Bundle) AddGlobalsFile(filename string) *Bundle {
  	var f, err = os.Open(filename)
  	if err != nil {
  		b.err = err
  		return b
  	}
  	globals, err := ParseGlobals(f)
  	if err != nil {
  		b.err = err
  	}
  	f.Close()
  	return b.AddGlobalsMap(globals)
  }
docs: // AddGlobalsFile opens and parses the given filename for Soy globals, and adds
  // the resulting data map to the bundle.