func clear[T ~[]Type | ~map[Type]Type1](t T)

// The close built-in function closes a channel, which must be either
// bidirectional or send-only. It should be executed only by the sender,
// never the receiver, and has the effect of shutting down the channel after
// the last sent value is received. After the last value has been received
// from a closed channel c, any receive from c will succeed without

    * E.g., `await myfile.seek(0)` would go to the start of the file.
    * This is especially useful if you run `await myfile.read()` once and then need to read the contents again.
* `close()`: Closes the file.

As all these methods are `async` methods, you need to "await" them.

For example, inside of an `async` *path operation function* you can get the contents with:

```Python

	// responses from the remote server.
	// Channel will be closed after error or when remote closes.
	// responses *must* be read to either an error is returned or the channel is closed.
	responses *Stream
	newResp   func() Resp

	// Requests sent to the server.
	// If the handler is defined with 0 incoming capacity this will be nil.
	// Channel *must* be closed to signal the end of the stream.

		h.currentStatus.Summary = healFinishedStatus
		h.mutex.Unlock()

		// drain traverse channel so the traversal
		// go-routine does not leak.
		go func() {
			// Eventually the traversal go-routine closes
			// the channel and returns, so this go-routine
			// itself will not leak.
			<-h.traverseAndHealDoneCh
		}()
	}
}

    if (compareAndUpdateState(OPEN, WILL_CLOSE)) {
      logger.get().log(FINER, "will close {0}", this);
      future.addListener(
          new Runnable() {
            @Override
            public void run() {
              checkAndUpdateState(WILL_CLOSE, CLOSING);
              close();
              checkAndUpdateState(CLOSING, CLOSED);
            }
          },

)

// DrainBody close non nil response with any response Body.
// convenient wrapper to drain any remaining data on response body.
//
// Subsequently this allows golang http RoundTripper
// to reuse the same connection for future requests.
func DrainBody(respBody io.ReadCloser) {
	// Callers should close resp.Body when done reading from it.
	// If resp.Body is not closed, the Client's underlying RoundTripper

  public void testCreate() {
    assertThat(Closer.create().suppressor).isInstanceOf(Closer.SuppressingSuppressor.class);
  }

  public void testNoExceptionsThrown() throws IOException {
    Closer closer = new Closer(suppressor);

    TestCloseable c1 = closer.register(TestCloseable.normal());
    TestCloseable c2 = closer.register(TestCloseable.normal());
    TestCloseable c3 = closer.register(TestCloseable.normal());

  public void testCreate() {
    assertThat(Closer.create().suppressor).isInstanceOf(Closer.SuppressingSuppressor.class);
  }

  public void testNoExceptionsThrown() throws IOException {
    Closer closer = new Closer(suppressor);

    TestCloseable c1 = closer.register(TestCloseable.normal());
    TestCloseable c2 = closer.register(TestCloseable.normal());
    TestCloseable c3 = closer.register(TestCloseable.normal());

                new ClosingCallable<TestCloseable>() {
                  @Override
                  public TestCloseable call(DeferredCloser closer) throws Exception {
                    closer.eventuallyClose(closeable1, closingExecutor);
                    closer.eventuallyClose(closeable2, closingExecutor);
                    return closeable3;
                  }
                },
                executor)

                new ClosingCallable<TestCloseable>() {
                  @Override
                  public TestCloseable call(DeferredCloser closer) throws Exception {
                    closer.eventuallyClose(closeable1, closingExecutor);
                    closer.eventuallyClose(closeable2, closingExecutor);
                    return closeable3;
                  }
                },
                executor)