Add WebSocket Extension Configuration(s) to Upgrade Request. <p> This is merely the list of requested Extensions to use, see {@link UpgradeResponse#getExtensions()} for what was negotiated
@param configs the configuration(s) to add
See Implementation
Add WebSocket Extension Configuration(s) to Upgrade Request. <p> This is merely the list of requested Extensions to use, see {@link UpgradeResponse#getExtensions()} for what was negotiated
@param configs the configuration(s) to add