RdmaMemoryRegion region;
        
        while ((region = availableSendRegions.poll()) != null) {
            region.close();
            totalReleased.incrementAndGet();
        }
        
        while ((region = availableReceiveRegions.poll()) != null) {
            region.close();
            totalReleased.incrementAndGet();
        }
    }
    

    class ResourceManagementTests {

        @Test
        @DisplayName("close operation should work correctly")
        void testClose() {
            // When/Then
            assertDoesNotThrow(() -> mockResource.close(), "Close operation should not throw exception");
            verify(mockResource).close();
        }

        @Test
        @DisplayName("resource should be AutoCloseable")

        this.b = b;
        this.off = off;
        dataLength = len;
        digest = null; /* otherwise recycled commands
                        * like writeandx will choke if session
                        * closes in between */
    }

    @Override
    int getBatchLimit(final byte command) {
        if (command == SMB_COM_READ_ANDX) {
            return READ_ANDX_BATCH_LIMIT;
        }

            }
            closed = true;
        }
    }

    /**
     * Check if this authenticator has been closed
     *
     * @return true if closed, false otherwise
     */
    public boolean isClosed() {
        return closed;
    }

    private void checkNotClosed() {
        if (closed) {
            throw new IllegalStateException("Authenticator has been closed");
        }
    }

                for (i in 0..9) {
                  sink.writeByte(0)
                  sink.flush()
                  sleep(100)
                }
                fail("Expected connection to be closed")
              }
            },
        ),
      )
    cancelLater(call, 500)
    assertFailsWith<IOException> {
      call.execute()
    }.also { expected ->

	return json.Marshal(&SrvRecord{
		Host:         ip,
		Port:         json.Number(port),
		TTL:          ttl,
		CreationDate: t,
	})
}

// Close closes the internal etcd client and cannot be used further
func (c *CoreDNS) Close() error {
	c.etcdClient.Close()
	return nil
}

// List - Retrieves list of DNS entries for the domain.
func (c *CoreDNS) List() (map[string][]SrvRecord, error) {

    }

    /**
     * {@inheritDoc}
     *
     * @see jcifs.SmbTransportPool#close()
     */
    @Override
    public boolean close() throws CIFSException {
        boolean inUse = false;

        // Cleanup first
        cleanup();
        log.debug("Closing pool");

        // Create a snapshot of connections to close
        List<SmbTransportImpl> toClose = new ArrayList<>(this.connections);

  public CharSequenceReader(CharSequence seq) {
    this.seq = checkNotNull(seq);
  }

  private void checkOpen() throws IOException {
    if (seq == null) {
      throw new IOException("reader closed");
    }
  }

  private boolean hasRemaining() {
    return remaining() > 0;
  }

  private int remaining() {
    requireNonNull(seq); // safe as long as we call this only after checkOpen

        @Test
        @DisplayName("Should wipe key on close")
        void testCloseWipesKey() throws Exception {
            byte[] sessionKey = new byte[16];
            Arrays.fill(sessionKey, (byte) 0xBB);

            Smb2SigningDigest digest = new Smb2SigningDigest(sessionKey, Smb2Constants.SMB2_DIALECT_0202, null);

            // Close the digest
            digest.close();

            // Verify operations fail after close

                for (i in 0..9) {
                  sink.writeByte(0)
                  sink.flush()
                  sleep(100)
                }
                fail("Expected connection to be closed")
              }
            },
          ).build(),
      )
    interruptLater(500)
    assertFailsWith<IOException> {
      call.execute()
    }
  }

  @Test