«Менеджери контексту» - це будь-які Python-об'єкти, які можна використовувати в операторі `with`.

Наприклад, [можна використати `with`, щоб прочитати файл](https://docs.python.org/3/tutorial/inputoutput.html#reading-and-writing-files):

```Python
with open("./somefile.txt") as f:
    contents = f.read()
    print(contents)
```

Під капотом `open("./somefile.txt")` створює об'єкт, який називається «Менеджер контексту».

labels.jobStatus=Status
labels.labelTypeIds=Labels
labels.lang=Language
labels.outputs=Outputs
labels.pos=Part-of-speech
labels.purgeJobLogDay=Delete old job logs
labels.purgeUserInfoDay=Delete old user logs
labels.reading=Reading
labels.roleTypeIds=Role IDs
labels.scriptData=Script
labels.scriptResult=Result
labels.scriptType=Execution Method
labels.segmentation=Segmentation
labels.startTime=Start Time
labels.target=Target

   * it slower than the native version.
   *
   * @param input the input bytes
   * @param offset the offset into the array at which to start reading
   * @param length the number of bytes from the input to read
   * @return a long of a concatenated 8 bytes
   */
  static long load64Safely(byte[] input, int offset, int length) {
    long result = 0;

	if cap(dst) < skip {
		dst = make([]byte, 0, skip+1024)
	}
	dst = dst[:skip]
	if skip > 0 {
		n, err := io.ReadFull(r.buf, dst)
		if err != nil && err != io.ErrUnexpectedEOF {
			// If an EOF happens after reading some but not all the bytes,
			// ReadFull returns ErrUnexpectedEOF.
			return dst[:n], err
		}
		dst = dst[:n]
		if err == io.ErrUnexpectedEOF {
			return dst, io.EOF
		}
	}
	// Read until next line.

      return null // Another edit is in progress.
    }

    if (entry != null && entry.lockingSourceCount != 0) {
      return null // We can't write this file because a reader is still reading it.
    }

    if (mostRecentTrimFailed || mostRecentRebuildFailed) {
      // The OS has become our enemy! If the trim job failed, it means we are storing more data than

    stream.defaultReadObject();
    keyToKeyList = CompactLinkedHashMap.create();
    int size = stream.readInt();
    for (int i = 0; i < size; i++) {
      @SuppressWarnings("unchecked") // reading data stored by writeObject
      K key = (K) stream.readObject();
      @SuppressWarnings("unchecked") // reading data stored by writeObject
      V value = (V) stream.readObject();
      put(key, value);
    }
  }

 *
 * Exchanges that do not have a request body may skip creating and closing the request body.
 * Exchanges that do not have a response body can call
 * [newFixedLengthSource(0)][newFixedLengthSource] and may skip reading and closing that source.
 */
class Http1ExchangeCodec(
  /** The client that configures this stream. May be null for HTTPS proxy tunnels. */
  private val client: OkHttpClient?,
  override val carrier: ExchangeCodec.Carrier,

     * @throws CIFSException if an error occurs accessing the resource
     */
    OutputStream openOutputStream() throws CIFSException;

    /**
     * Opens an input stream reading the file (read only)
     *
     * @param flags
     *            open flags
     * @param access
     *            desired access flags
     * @param sharing

        assertEquals(65536, serverData.maxRawSize);
        assertEquals(123456789, serverData.sessionKey);
        assertEquals(SmbConstants.CAP_UNICODE | SmbConstants.CAP_NT_SMBS, serverData.capabilities);
        // readInt2 returns unsigned value, so -480 becomes 65056
        assertEquals(65056, serverData.serverTimeZone);
        assertEquals(8, serverData.encryptionKeyLength);
    }

    @Test

        System.arraycopy(buffer, offset, keyBytes, 0, 16);
        this.leaseKey = new Smb2LeaseKey(keyBytes);
        
        this.leaseState = readInt4(buffer, offset + 16);
        this.leaseFlags = readInt4(buffer, offset + 20);
        this.leaseDuration = readInt8(buffer, offset + 24);
        
        if (length >= 52) {  // V2 lease
            byte[] parentKeyBytes = new byte[16];