return "", fmt.Errorf("invalid Diagnostic.URL %q: %s", raw, err)
	}
	base, err := url.Parse(a.URL)
	if err != nil {
		return "", fmt.Errorf("invalid Analyzer.URL %q: %s", a.URL, err)
	}
	return base.ResolveReference(u).String(), nil

	// Analysis driver should treat the URL as "#"+Category.
	//
	// The URL may be relative. If so, the base URL is that of the
	// Analyzer that produced the diagnostic;
	// see https://pkg.go.dev/net/url#URL.ResolveReference.
	URL string

	// SuggestedFixes is an optional list of fixes to address the
	// problem described by the diagnostic, each one representing
	// an alternative strategy; at most one may be applied.

// failure, otherwise its return value is the same as [URL.ResolveReference].
func (u *URL) Parse(ref string) (*URL, error) {
	refURL, err := Parse(ref)
	if err != nil {
		return nil, err
	}
	return u.ResolveReference(refURL), nil
}

// ResolveReference resolves a URI reference to an absolute URI from

		base := mustParse(test.base)
		rel := mustParse(test.rel)
		url := base.ResolveReference(rel)
		if got := url.String(); got != test.expected {
			t.Errorf("URL(%q).ResolveReference(%q)\ngot  %q\nwant %q", test.base, test.rel, got, test.expected)
		}
		// Ensure that new instances are returned.
		if base == url {
			t.Errorf("Expected URL.ResolveReference to return new URL instance.")
		}
		// Test the convenience wrapper too.

	u, err := url.Parse("../../..//search?q=dotnet")
	if err != nil {
		log.Fatal(err)
	}
	base, err := url.Parse("http://example.com/directory/")
	if err != nil {
		log.Fatal(err)
	}
	fmt.Println(base.ResolveReference(u))
	// Output:
	// http://example.com/search?q=dotnet
}

func ExampleParseQuery() {
	m, err := url.ParseQuery(`x=1&y=2&y=3`)
	if err != nil {
		log.Fatal(err)
	}
	fmt.Println(toJSON(m))

		{"(*URL).Parse", Method, 0},
		{"(*URL).Port", Method, 8},
		{"(*URL).Query", Method, 0},
		{"(*URL).Redacted", Method, 15},
		{"(*URL).RequestURI", Method, 0},
		{"(*URL).ResolveReference", Method, 0},
		{"(*URL).String", Method, 0},
		{"(*URL).UnmarshalBinary", Method, 8},
		{"(*Userinfo).Password", Method, 0},
		{"(*Userinfo).String", Method, 0},
		{"(*Userinfo).Username", Method, 0},

pkg net/url, method (*URL) IsAbs() bool
pkg net/url, method (*URL) Parse(string) (*URL, error)
pkg net/url, method (*URL) Query() Values
pkg net/url, method (*URL) RequestURI() string
pkg net/url, method (*URL) ResolveReference(*URL) *URL
pkg net/url, method (*URL) String() string
pkg net/url, method (*Userinfo) Password() (string, bool)
pkg net/url, method (*Userinfo) String() string
pkg net/url, method (*Userinfo) Username() string