"k8s.io/apimachinery/pkg/types"

	"istio.io/istio/pkg/maps"
	"istio.io/istio/pkg/util/sets"
)

type PodToNetns map[string]WorkloadInfo

func (p PodToNetns) Close() {
	for _, wl := range p {
		wl.Netns.Close()
	}
}

type PodNetnsFinder interface {
	FindNetnsForPods(filter map[types.UID]*corev1.Pod) (PodToNetns, error)
}

type PodNetnsProcFinder struct {
	proc fs.FS
}

        return this.defaultCredentials;
    }


    /**
     * {@inheritDoc}
     *
     * @see jcifs.CIFSContext#close()
     */
    @Override
    public boolean close () throws CIFSException {
        boolean inUse = super.close();
        inUse |= this.transportPool.close();
        return inUse;
    }

			} else {
				var in *os.File
				if in, err = os.Open(inFilename); err != nil {
					return err
				}
				reader = in
				defer func() {
					if errClose := in.Close(); errClose != nil {
						log.Errorf("Error: close file from %s, %s", inFilename, errClose)

						// don't overwrite the previous error
						if err == nil {
							err = errClose
						}
					}
				}()
			}

		CertAuthority: path.Join("testdata", "contrib", "certs", "root_ca_cert.pem"),
	}

	con, err := clientConfig.connectNats()
	if err != nil {
		t.Errorf("Could not connect to nats: %v", err)
	}
	defer con.Close()
}

func TestNatsConnTLSClientAuthorization(t *testing.T) {
	s, opts := natsserver.RunServerWithConfig(filepath.Join("testdata", "contrib", "nats_tls_client_cert.conf"))
	defer s.Shutdown()

		return
	}

	// Keep in sync with src/cmd/go/internal/work/buildid.go:updateBuildID

	f, err := os.Open(file)
	if err != nil {
		log.Fatal(err)
	}
	matches, hash, err := buildid.FindAndHash(f, id, 0)
	f.Close()
	if err != nil {
		log.Fatal(err)
	}

	// <= go 1.7 doesn't embed the contentID or actionID, so no slash is present
	if !strings.Contains(id, "/") {

    init {
      val source = snapshot.getSource(ENTRY_BODY)
      bodySource =
        object : ForwardingSource(source) {
          @Throws(IOException::class)
          override fun close() {
            snapshot.close()
            super.close()
          }
        }.buffer()
    }

    override fun contentType(): MediaType? = contentType?.toMediaTypeOrNull()

        } finally {
            if (listener != null) {
                listener.onRequestEnd(this, request, exceptionList);
            }
        }
    }

    @Override
    public void close() throws Exception {
        client.close();
    }

    public CrawlerClient getCrawlerClient() {
        return client;
    }

    public void setCrawlerClient(final CrawlerClient client) {
        this.client = client;

    public In() throws IOException {
      super(new ByteArrayInputStream(bytes), options);
    }

    @Override
    public void close() throws IOException {
      inputStreamClosed = true;
      super.close();
    }
  }

    public In() throws IOException {
      super(new ByteArrayInputStream(bytes), options);
    }

    @Override
    public void close() throws IOException {
      inputStreamClosed = true;
      super.close();
    }
  }

`TryRead` and `TryWrite` are still available for non-blocking reads and writes.

To signify the end of the stream, close the ring buffer from the writer side with `rb.CloseWriter()`

Either side can use `rb.CloseWithError(err error)` to signal an error and close the ring buffer. 
Any reads or writes will return the error on next call.