*
   * <p>Note that this method will return ranges with unbounded endpoints if {@link BoundType#OPEN}
   * is requested for a domain minimum or maximum. For example, if {@code set} was created from the
   * range {@code [1..Integer.MAX_VALUE]} then {@code set.range(CLOSED, OPEN)} must return {@code
   * [1..∞)}.
   *
   * @throws NoSuchElementException if this set is empty
   */

<div class="termy">

```console
$ pip install websockets

---> 100%
```

</div>

## WebSockets client

### In production

In your production system, you probably have a frontend created with a modern framework like React, Vue.js or Angular.

And to communicate using WebSockets with your backend you would probably use your frontend's utilities.

        for (int i = 0; i < NUM; i++) {
            final Map<String, Object> requestBody = createTestParam(i);
            checkPutMethod(requestBody, getItemEndpointSuffix()).then().body("response.created", equalTo(true)).body("response.status",
                    equalTo(0));

            //logger.info("create {}{}", i, checkPutMethod(requestBody, getItemEndpointSuffix()).asString()); // for debugging
            refresh();

    return new ImmutableClassToInstanceMap<>(map);
  }

  /**
   * Returns a new builder. The generated builder is equivalent to the builder created by the {@link
   * Builder} constructor.
   */
  public static <B> Builder<B> builder() {
    return new Builder<>();
  }

  /**
   * A builder for creating immutable class-to-instance maps. Example:
   *

	credentials auth.Credentials, t *testing.T,
) {
	objectName := "test-object"
	// set of byte data for PutObject.
	// object has to be created before running tests for HeadObject.
	// this is required even to assert the HeadObject data,
	// since dataInserted === dataFetched back is a primary criteria for any object storage this assertion is critical.

   *       {@link NullPointerException}.
   *   <li>If there is any visible constructor or visible static factory method declared by the
   *       class, all visible instance methods will be checked too using the instance created by
   *       invoking the constructor or static factory method.
   *   <li>If the constructor or factory method used to construct instance takes a parameter that

  private final Stats yStats;
  private final double sumOfProductsOfDeltas;

  /**
   * Internal constructor. Users should use {@link PairedStatsAccumulator#snapshot}.
   *
   * <p>To ensure that the created instance obeys its contract, the parameters should satisfy the
   * following constraints. This is the callers responsibility and is not enforced here.
   *
   * <ul>

# five framework-embedded messages (don't change key names)
# - - - - - - - - - -/
errors.login.failure=Login fehlgeschlagen.
errors.app.illegal.transition=Unzulässige Wertänderung, bitte erneut versuchen.
errors.app.db.already.deleted=Bearbeitungskonflikt, bitte erneut versuchen.
errors.app.db.already.updated=Bearbeitungskonflikt, bitte erneut versuchen.
errors.app.db.already.exists=Daten existieren bereits, bitte erneut versuchen.

   *
   * <p>Note that this method will return ranges with unbounded endpoints if {@link BoundType#OPEN}
   * is requested for a domain minimum or maximum. For example, if {@code set} was created from the
   * range {@code [1..Integer.MAX_VALUE]} then {@code set.range(CLOSED, OPEN)} must return {@code
   * [1..∞)}.
   *
   * @throws NoSuchElementException if this set is empty
   */

import com.google.common.testing.SerializableTester;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import junit.framework.TestCase;

/**
 * Tests for {@link PairedStats}. This tests instances created by {@link
 * PairedStatsAccumulator#snapshot}.
 *
 * @author Pete Gillin
 */
public class PairedStatsTest extends TestCase {

  public void testCount() {
    assertThat(EMPTY_PAIRED_STATS.count()).isEqualTo(0);