mux.go
func (mx *Mux) Trace(pattern string, handlerFn http.HandlerFunc) {
	mx.handle(mTRACE, pattern, handlerFn)
}
func (mx *Mux) Trace(pattern string, handlerFn http.HandlerFunc) {
	mx.handle(mTRACE, pattern, handlerFn)
}
func ( mx * Mux ) Trace ( pattern string , handlerFn http . HandlerFunc ) { mx . handle ( mTRACE , pattern , handlerFn ) }
// Trace adds the route `pattern` that matches a TRACE http method to
// execute the `handlerFn` http.HandlerFunc.
Trace adds the route pattern that matches a TRACE http method to execute the handlerFn http . HandlerFunc .