*
 * // In case bug 12345 happens again we'd rather just die
 * Verify.verify(bill.status() == Status.UNPAID,
 *     "Unexpected bill status: %s", bill.status());
 * }</pre>
 *
 * <h3>Comparison to alternatives</h3>
 *
 * <p><b>Note:</b> In some cases the differences explained below can be subtle. When it's unclear
 * which approach to use, <b>don't worry</b> too much about it; just pick something that seems
 * reasonable and it will be fine.

// for example: one goroutine found error and just close the database, and others are executing SQL
// this test making sure that the gorm would not get a Segmentation Fault,
// and the only error cause by this is using a closed Stmt or gorm.ErrInvalidDB
// and all of the goroutine must got gorm.ErrInvalidDB after database close
func TestPreparedStmtConcurrentClose(t *testing.T) {

    return lazyWeakCustom(stripes, WeakSafeReadWriteLock::new);
  }
  /**
   * ReadWriteLock implementation whose read and write locks retain a reference back to this lock.
   * Otherwise, a reference to just the read lock or just the write lock would not suffice to ensure
   * the {@code ReadWriteLock} is retained.
   */
  private static final class WeakSafeReadWriteLock implements ReadWriteLock {
    private final ReadWriteLock delegate;

/**
 * This URLConnection method just returns the result of <tt>lastModified</tt>.
 *
 * @return the last modified data as milliseconds since Jan 1, 1970
 */
    public long getDate() {
        try {
            return lastModified();
        } catch( SmbException se ) {
        }
        return 0L;
    }

/**
 * This URLConnection method just returns the result of <tt>lastModified</tt>.
 *

  }

  // Static factories

  /**
   * Returns an ordering based on an <i>existing</i> comparator instance. Note that it is
   * unnecessary to create a <i>new</i> anonymous inner class implementing {@code Comparator} just
   * to pass it in here. Instead, simply subclass {@code Ordering} and implement its {@code compare}
   * method directly.
   *
   * <p>The returned object is serializable if {@code comparator} is serializable.
   *

   * process it; all should produce the same answer, the only difference should be the number of
   * process()/processRemaining() invocations, due to alignment.
   */
  @AndroidIncompatible // slow. TODO(cpovirk): Maybe just reduce iterations under Android.
  public void testExhaustive() throws Exception {
    Random random = new Random(0); // will iteratively make more debuggable, each time it breaks

{!../../docs_src/websockets/tutorial001.py!}
```

/// note | "Technical Details"

You could also use `from starlette.websockets import WebSocket`.

**FastAPI** provides the same `WebSocket` directly just as a convenience for you, the developer. But it comes directly from Starlette.

///

## Await for messages and send messages

In your WebSocket route you can `await` for messages and send messages.

    while (!descendant.equals(ancestor)) {
      classes.add(descendant);
      descendant = descendant.getSuperclass();
    }

    return classes;
  }

  /**
   * Not really a signature -- just the parts that affect whether one method is a fauxveride of a
   * method from an ancestor class.
   *
   * <p>See JLS 8.4.2 for the definition of the related "override-equivalent."
   */

    while (!descendant.equals(ancestor)) {
      classes.add(descendant);
      descendant = descendant.getSuperclass();
    }

    return classes;
  }

  /**
   * Not really a signature -- just the parts that affect whether one method is a fauxveride of a
   * method from an ancestor class.
   *
   * <p>See JLS 8.4.2 for the definition of the related "override-equivalent."
   */

            file.send( new TransWaitNamedPipe( "\\pipe" + file.unc ),
                                    new TransWaitNamedPipeResponse() );
        }
        writeDirect( b, off, len, 0 );
    }
/**
 * Just bypasses TransWaitNamedPipe - used by DCERPC bind.
 */
    public void writeDirect( byte[] b, int off, int len, int flags ) throws IOException {
        if( len <= 0 ) {
            return;
        }