var ErrNotImplemented = errors.New("not implemented")

// ReadFrom implements support for calling internal io.ReaderFrom implementations
// returns an error if the underlying ResponseWriter does not implement io.ReaderFrom
func (lrw *ResponseRecorder) ReadFrom(r io.Reader) (int64, error) {
	if lrw.ReaderFrom != nil {
		n, err := lrw.ReaderFrom.ReadFrom(r)
		lrw.bytesWritten += int(n)
		return n, err
	}

	// Output: 1 2 3 4
}

// ExampleWriter_ReadFrom demonstrates how to use the ReadFrom method of Writer.
func ExampleWriter_ReadFrom() {
	var buf bytes.Buffer
	writer := bufio.NewWriter(&buf)

	data := "Hello, world!\nThis is a ReadFrom example."
	reader := strings.NewReader(data)

	n, err := writer.ReadFrom(reader)
	if err != nil {
		fmt.Println("ReadFrom Error:", err)
		return
	}

	if err = writer.Flush(); err != nil {

        ModelBuilder builder = new DefaultModelBuilderFactory().newInstance();
        assertNotNull(builder);
        File pom = getPom("simple");

        String originalExists =
                readPom(pom).getProfiles().get(1).getActivation().getFile().getExists();

        DefaultModelBuildingRequest request = new DefaultModelBuildingRequest();
        request.setProcessPlugins(true);
        request.setPomFile(pom);

					}
				case testReadFrom:
					f := &testFile{ops: tf.ops}
					got, err := tw.readFrom(f)
					if _, ok := err.(testError); ok {
						t.Errorf("test %d, ReadFrom(): %v", i, err)
					} else if got != tf.wantCnt || !equalError(err, tf.wantErr) {
						t.Errorf("test %d, ReadFrom() = (%d, %v), want (%d, %v)", i, got, err, tf.wantCnt, tf.wantErr)
					}
					if len(f.ops) > 0 {

	n, err := w.Write([]byte("0123456789"))
	if n != 10 || err != nil {
		t.Fatalf("Write returned (%v, %v), want (10, nil)", n, err)
	}

	// Use ReadFrom to read in some data.
	n2, err := w.ReadFrom(strings.NewReader("abcdef"))
	if n2 != 6 || err != nil {
		t.Fatalf("ReadFrom returned (%v, %v), want (6, nil)", n2, err)
	}
}

type emptyThenNonEmptyReader struct {
	r io.Reader
	n int
}

	if err != nil && err != ErrWriteTooLong {
		tw.err = err
	}
	return n, err
}

// readFrom populates the content of the current file by reading from r.
// The bytes read must match the number of remaining bytes in the current file.
//
// If the current file is sparse and r is an io.ReadSeeker,
// then readFrom uses Seek to skip past holes defined in Header.SparseHoles,
// assuming that skipped regions are all NULs.

}

// MinRead is the minimum slice size passed to a [Buffer.Read] call by
// [Buffer.ReadFrom]. As long as the [Buffer] has at least MinRead bytes beyond
// what is required to hold the contents of r, [Buffer.ReadFrom] will not grow the
// underlying buffer.
const MinRead = 512

// ReadFrom reads data from r until EOF and appends it to the buffer, growing

func TestReadFromPanicReader(t *testing.T) {

	// First verify non-panic behaviour
	var buf Buffer
	i, err := buf.ReadFrom(panicReader{})
	if err != nil {
		t.Fatal(err)
	}
	if i != 0 {
		t.Fatalf("unexpected return from bytes.ReadFrom (1): got: %d, want %d", i, 0)
	}
	check(t, "TestReadFromPanicReader (1)", &buf, "")

	// Confirm that when Reader panics, the empty buffer remains empty

 * has not actually been put in the {@code BloomFilter}.
 *
 * <p>Bloom filters are serializable. They also support a more compact serial representation via the
 * {@link #writeTo} and {@link #readFrom} methods. Both serialized forms will continue to be
 * supported by future versions of this library. However, serial forms generated by newer versions

				err = io.ErrUnexpectedEOF
			}
			return fmt.Errorf("readXLMetaNoData(readMore): %w", err)
		}
		return nil
	}
	tmp, major, minor, err := checkXL2V1(buf)
	if err != nil {
		err = readMore(size)
		return buf, err
	}
	switch major {
	case 1:
		switch minor {
		case 0:
			err = readMore(size)
			return buf, err
		case 1, 2, 3:
			sz, tmp, err := msgp.ReadBytesHeader(tmp)