pkg net/http/httputil, method (*ClientConn) Do(*http.Request) (*http.Response, error)
pkg net/http/httputil, method (*ClientConn) Hijack() (net.Conn, *bufio.Reader)
pkg net/http/httputil, method (*ClientConn) Pending() int
pkg net/http/httputil, method (*ClientConn) Read(*http.Request) (*http.Response, error)
pkg net/http/httputil, method (*ClientConn) Write(*http.Request) error

Defining a subclass of a class defined by the Library is deemed a mode
of using an interface provided by the Library.

  A "Combined Work" is a work produced by combining or linking an
Application with the Library.  The particular version of the Library
with which the Combined Work was made is also called the "Linked
Version".