if (!allowNulls) {
      for (Object element : contents) {
        if (element == null) {
          throw new NullPointerException();
        }
      }
    }
  }

  @Override
  public int size() {
    return contents.length;
  }

  @Override
  public boolean contains(@Nullable Object object) {
    if (!allowNulls) {
      // behave badly
      checkNotNull(object);
    }

		file := c.Args().Get(0)
		if strings.HasSuffix(file, ".zip") {
			var sz int64
			f, err := os.Open(file)
			if err != nil {
				return err
			}
			if st, err := f.Stat(); err == nil {
				sz = st.Size()
			}
			defer f.Close()
			zr, err := zip.NewReader(f, sz)
			if err != nil {
				return err
			}
			for _, file := range zr.File {

    val synStream = peer.takeFrame()
    assertThat(synStream.type).isEqualTo(Http2.TYPE_HEADERS)
    var data = peer.takeFrame()
    assertThat(data.data!!.size).isEqualTo(peer.maxOutboundDataLength())
    data = peer.takeFrame()
    assertThat(data.data!!.size).isEqualTo(1)
  }

  @Test fun pushPromiseStream() {
    // Write the mocking script.
    peer.sendFrame().settings(Settings())
    peer.acceptFrame() // ACK

        // Set converter value first
        setConverter(response, 0);

        // Set number of entries
        setNumEntries(response, 1);

        // Calculate buffer size
        int serverNameSize = 16; // Fixed field size
        int versionSize = 2;
        int typeSize = 4;
        int offsetSize = 4;
        int commentSize = comment.length() + 1;

            }
        }
    }

    /**
     * Get the number of stored keys
     *
     * @return number of keys in memory
     */
    public int getKeyCount() {
        return sessionKeys.size();
    }

    /**
     * Check if a session key exists
     *
     * @param sessionId session identifier
     * @return true if key exists
     */
    public boolean hasSessionKey(String sessionId) {

// Access a file (encryption is transparent - automatically used if server requires it)
try (SmbFile file = new SmbFile("smb://server/share/file.txt", context)) {
    if (file.exists()) {
        System.out.println("File size: " + file.length());
    }
}
```

### With Authentication

```java
import jcifs.CIFSContext;
import jcifs.context.BaseContext;
import jcifs.smb.NtlmPasswordAuthenticator;

        final int start = bufferIndex;
        final int structureSize = SMBUtil.readInt2(buffer, bufferIndex);
        if (structureSize != 16) {
            throw new SMBProtocolDecodingException("Structure size is not 16");
        }

        this.shareType = buffer[bufferIndex + 2];
        bufferIndex += 4;
        this.shareFlags = SMBUtil.readInt4(buffer, bufferIndex);
        bufferIndex += 4;

            Arrays.fill(buf, 'x'.code.toByte())
            var i = 0
            while (i < n) {
              sink.write(buf, 0, Math.min(buf.size, n - i))
              i += buf.size
            }
          }
        }
      }
    val response =
      getResponse(
        Request(
          url = server.url("/"),
          body = requestBody,
        ),

      this.delegate = delegate;
      this.delta = delta;
    }

    @Override
    protected List<E> delegate() {
      return delegate;
    }

    @Override
    public int size() {
      return delegate.size() + delta;
    }
  }

  @SuppressWarnings("JoinIterableIterator") // explicitly testing iterator overload, too
  public void testNoSpecialNullBehavior() {
    checkNoOutput(J, iterable);

    }
  }

  // Factory method that skips the null checks.  Used only when the elements
  // are guaranteed to be non-null.
  static <E> ImmutableList<E> unsafeDelegateList(List<? extends E> list) {
    switch (list.size()) {
      case 0:
        return of();
      case 1:
        return of(list.get(0));
      default:
        @SuppressWarnings("unchecked")
        List<E> castedList = (List<E>) list;