code: func getMaxHeaderTableSize(settings []http2.Setting) uint32 {
  	for _, setting := range settings {
  		if setting.ID == http2.SettingHeaderTableSize {
  			return setting.Val
  		}
  	}
  	return 4096
  }
docs: // getMaxHeaderTableSize returns the SETTINGS_HEADER_TABLE_SIZE. If not present
  // default value is 4096 as specified by RFC 7540 Section 6.5.2.