url = ""
    content_type_level = "0"
    if override1:
        url += "/level1"
        content_type_level = "1"
    if override2:
        url += "/level2"
        content_type_level = "2"
    if override3:
        url += "/override3"
        content_type_level = "3"
    else:
        url += "/default3"
    url += "?level3=foo"
    response = client.get(url)

pkg io/fs, var SkipDir error
pkg log, func Default() *Logger
pkg net, var ErrClosed error
pkg net/http, func FS(fs.FS) FileSystem
pkg net/http, type Transport struct, GetProxyConnectHeader func(context.Context, *url.URL, string) (Header, error)
pkg os, const ModeAppend fs.FileMode
pkg os, const ModeCharDevice fs.FileMode
pkg os, const ModeDevice fs.FileMode
pkg os, const ModeDir fs.FileMode
pkg os, const ModeExclusive fs.FileMode

pkg net, method (*DNSConfigError) Unwrap() error
pkg net, method (*OpError) Unwrap() error
pkg net, type DNSError struct, IsNotFound bool
pkg net, type ListenConfig struct, KeepAlive time.Duration
pkg net/url, method (*Error) Unwrap() error
pkg os/exec, method (*Cmd) String() string
pkg os/exec, method (*Error) Unwrap() error
pkg os, func UserConfigDir() (string, error)
pkg os, method (*LinkError) Unwrap() error

<a href="#Keywords">keyword</a> and the opening brace of the block
of an "if", "for", or "switch" statement, and the composite literal
is not enclosed in parentheses, square brackets, or curly braces.
In this rare case, the opening brace of the literal is erroneously parsed
as the one introducing the block of statements. To resolve the ambiguity,
the composite literal must appear within parentheses.
</p>