* @since 14.0
   */
  @GwtIncompatible // regular expressions
  public static @Nullable Float tryParse(String string) {
    if (Doubles.FLOATING_POINT_PATTERN.matcher(string).matches()) {
      // TODO(lowasser): could be potentially optimized, but only with
      // extensive testing
      try {
        return Float.parseFloat(string);
      } catch (NumberFormatException e) {

    assertSplitterIterableIsLazy(Splitter.on(","));
  }

  @J2ktIncompatible
  @GwtIncompatible // java.util.regex.Pattern
  @AndroidIncompatible // not clear that j.u.r.Matcher promises to handle mutations during use
  public void testSplitterIterableIsLazy_pattern() {
    if (!CommonPattern.isPcreLike()) {
      return;
    }
    assertSplitterIterableIsLazy(Splitter.onPattern(","));
  }

            final String key = e.getKey();
            if (StringUtil.isBlank(key)) {
                return false;
            }
            return pattern.matcher(key).matches();
        }).collect(Collectors.toMap(Entry<String, String>::getKey, Entry<String, String>::getValue));
    }

    /**
     * Gets a map of environment variables.
     *

   * @since 14.0
   */
  @GwtIncompatible // regular expressions
  public static @Nullable Double tryParse(String string) {
    if (FLOATING_POINT_PATTERN.matcher(string).matches()) {
      // TODO(lowasser): could be potentially optimized, but only with
      // extensive testing
      try {
        return Double.parseDouble(string);
      } catch (NumberFormatException e) {

  private static void checkTryParse(String input) {
    Double expected = referenceTryParse(input);
    assertThat(Doubles.tryParse(input)).isEqualTo(expected);
    if (expected != null && !Doubles.FLOATING_POINT_PATTERN.matcher(input).matches()) {
      // TODO(cpovirk): Use SourceCodeEscapers if it is added to Guava.
      StringBuilder escapedInput = new StringBuilder();
      for (char c : input.toCharArray()) {

     * @return True if the status code indicates a redirect, false otherwise
     */
    protected boolean isRedirectHttpStatus(final int httpStatusCode) {
        return redirectHttpStatusPattern.matcher(Integer.toString(httpStatusCode)).matches();
    }

    /**
     * Executes the HTTP client request.
     *
     * @param httpRequest The HTTP request to execute
     * @return The HTTP response

* etcd3: watcher logging error ([#32831](https://github.com/kubernetes/kubernetes/pull/32831), [@hongchaodeng](https://github.com/hongchaodeng))
* etcd: watcher centralize error handling ([#32907](https://github.com/kubernetes/kubernetes/pull/32907), [@hongchaodeng](https://github.com/hongchaodeng))

* kube-apiserver: fixed a bug that could cause a goroutine leak if the apiserver encountered an encoding error serving a watch to a websocket watcher ([#84693](https://github.com/kubernetes/kubernetes/pull/84693), [@tedyu](https://github.com/tedyu))

# Using cgo with the go command

To use cgo write normal Go code that imports a pseudo-package "C".
The Go code can then refer to types such as C.size_t, variables such
as C.stdout, or functions such as C.putchar.

If the import of "C" is immediately preceded by a comment, that
comment, called the preamble, is used as a header when compiling
the C parts of the package. For example:

	// #include <stdio.h>

// layer.
type IAMStoreSys struct {
	IAMStorageAPI

	group  *singleflight.Group
	policy *singleflight.Group
}

// HasWatcher - returns if the storage system has a watcher.
func (store *IAMStoreSys) HasWatcher() bool {
	_, ok := store.IAMStorageAPI.(iamStorageWatcher)
	return ok
}

// GetUser - fetches credential from memory.