Browse files in silverstripe / external-content / classes / Zend_Http_Client_Adapter_Proxy
Visit ssmods.com to search for Silvertripe Modules.
Search in silverstripe / external-content / classes / Zend_Http_Client_Adapter_Proxy
Search for classes, interfaces, traits and methods by name.
site wide Google Search
Beware: Google is usually a bit out of date.