t.Fatalf("length differs from expected")
	}

	v, ok := lc.Peek("key1")
	if v != "val1" {
		t.Fatalf("value differs from expected")
	}
	if !ok {
		t.Fatalf("should be true")
	}

	if !lc.Contains("key1") {
		t.Fatalf("should contain key1")
	}
	if lc.Contains("key2") {
		t.Fatalf("should not contain key2")
	}

	v, ok = lc.Peek("key2")
	if v != "" {
		t.Fatalf("should be empty")
	}

}

func (in *Input) expectNewline(directive string) {
	tok := in.Stack.Next()
	if tok != '\n' {
		in.expectText("expected newline after", directive)
	}
}

func (in *Input) Next() ScanToken {
	if in.peek {
		in.peek = false
		tok := in.peekToken
		in.text = in.peekText
		return tok
	}
	// If we cannot generate a token after 100 macro invocations, we're in trouble.
	// The usual case is caught by Push, below, but be safe.

Moderne. Mit seinen einzigartigen Werken zeigt es neben Alberto Giacometti und Henri 
Matisse ein sehr umfangreiches Werk von Pablo Picasso. Nicht nur gemessen an der 
Vielzahl seiner Frauenporträts erscheint die Beschäftigung mit der Rolle der Frau in 
seinem Werk und Leben wichtig.  
Am Beispiel von Dora Maar, eine seiner langjährigen Lebensabschnittsgefährtinnen, 

		d.idx += int64(w)
		n += w
	}
	if d.idx >= d.length {
		extraBytes := d.idx - d.length
		n -= int(extraBytes)
		if n < 0 {
			n = 0
		}
		err = io.EOF
	}
	return
}

func (d *DummyDataGen) Seek(offset int64, whence int) (int64, error) {
	switch whence {
	case io.SeekStart:
		if offset < 0 {
			return 0, errors.New("Invalid offset")
		}
		d.idx = offset
	case io.SeekCurrent:
		if d.idx+offset < 0 {

	return nil
}

// Seek implements the [io.Seeker] interface.
func (r *Reader) Seek(offset int64, whence int) (int64, error) {
	r.prevRune = -1
	var abs int64
	switch whence {
	case io.SeekStart:
		abs = offset
	case io.SeekCurrent:
		abs = r.i + offset
	case io.SeekEnd:
		abs = int64(len(r.s)) + offset
	default:
		return 0, errors.New("bytes.Reader.Seek: invalid whence")
	}
	if abs < 0 {

pkg time, method (Time) AppendBinary([]uint8) ([]uint8, error) #62384
pkg time, method (Time) AppendText([]uint8) ([]uint8, error) #62384
pkg weak, func Make[$0 interface{}](*$0) Pointer[$0] #67552
pkg weak, method (Pointer[$0]) Value() *$0 #67552

	if r.creator == nil || r.err != nil {
		return
	}
	r.err = r.creator()
	r.creator = nil
}

// peek will return the name of the next object.
// Will return io.EOF if there are no more objects.
// Should be used sparingly.
func (r *metacacheReader) peek() (metaCacheEntry, error) {
	r.checkInit()
	if r.err != nil {
		return metaCacheEntry{}, r.err
	}
	if r.current.name != "" {

    options:
        members:
            - file
            - filename
            - size
            - headers
            - content_type
            - read
            - write
            - seek

* `write(data)`: Escribe `data` (`str` o `bytes`) en el archivo.
* `read(size)`: Lee `size` (`int`) bytes/caracteres del archivo.
* `seek(offset)`: Va a la posición de bytes `offset` (`int`) en el archivo.
    * Por ejemplo, `await myfile.seek(0)` iría al inicio del archivo.
    * Esto es especialmente útil si ejecutas `await myfile.read()` una vez y luego necesitas leer el contenido nuevamente.

* `write(data)`: Writes `data` (`str` or `bytes`) to the file.
* `read(size)`: Reads `size` (`int`) bytes/characters of the file.
* `seek(offset)`: Goes to the byte position `offset` (`int`) in the file.
    * E.g., `await myfile.seek(0)` would go to the start of the file.
    * This is especially useful if you run `await myfile.read()` once and then need to read the contents again.
* `close()`: Closes the file.