}
        BuildStep that = (BuildStep) o;
        return Objects.equals(project, that.project) && Objects.equals(name, that.name);
    }

    @Override
    public int hashCode() {
        return Objects.hash(project, name);
    }

    @Override
    public String toString() {
        return "BuildStep[" + "project="
                + project.getGroupId() + ":" + project.getArtifactId() + ", phase="

    return new Equivalence<T>() {
      @Override
      protected boolean doEquivalent(T a, T b) {
        return false;
      }

      @Override
      protected int doHash(T t) {
        return 0;
      }

      final String string = paramString(Equivalence.class, generateInt());

      @Override
      public String toString() {
        return string;
      }

### 更嚴重的錯誤 - 當機 { #bigger-errors-crashes }

然而，仍可能有一些情況，我們寫的程式碼「讓整個應用當機」，使 Uvicorn 與 Python 都崩潰。💥

即便如此，你大概也不會希望應用因為某處錯誤就一直處於死亡狀態，你可能會希望它「繼續運作」，至少讓沒有壞掉的「路徑操作（path operations）」能持續服務。

### 當機後重新啟動 { #restart-after-crash }

在這些會讓「執行中行程」整個崩潰的嚴重錯誤案例裡，你會希望有個外部元件負責「重新啟動」該行程，至少嘗試幾次...

/// tip

...不過，如果整個應用「一啟動就立刻」崩潰，那持續無止境地重啟大概沒有意義。但在這類情況下，你很可能會在開發過程中就發現，或至少在部署後馬上注意到。

所以讓我們專注在主要情境：應用在未來某些特定案例中可能會整體崩潰，但此時重新啟動仍然是有意義的。

- cloud.google.com/go/datastore: v1.0.0
- cloud.google.com/go/pubsub: v1.0.1
- cloud.google.com/go/storage: v1.0.0
- dmitri.shuralyov.com/gpu/mtl: 666a987
- github.com/cespare/xxhash/v2: [v2.1.1](https://github.com/cespare/xxhash/v2/tree/v2.1.1)
- github.com/checkpoint-restore/go-criu/v4: [v4.0.2](https://github.com/checkpoint-restore/go-criu/v4/tree/v4.0.2)

 * limitations under the License.
 */

package com.google.common.io;

import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.hash.Hashing.sha512;
import static com.google.common.io.TestOption.AVAILABLE_ALWAYS_ZERO;
import static com.google.common.io.TestOption.CLOSE_THROWS;
import static com.google.common.io.TestOption.OPEN_THROWS;

    assertFailsWith<IOException> {
      call.execute()
    }.also { expected ->
      assertThat(expected).hasMessage("timeout")
    }
  }

  /**
   * This test reproduces a crash where OkHttp attempted to use a deferred connection when the call
   * already had a healthy connection. It sets up a deferred connection by stalling the IPv6

     */
    public boolean isDeleted() {
        return isUpdated() && newInputs.length == 0;
    }

    @Override
    public int hashCode() {
        return Objects.hash(Arrays.hashCode(inputs), Arrays.hashCode(outputs));
    }

    @Override
    public boolean equals(final Object obj) {
        if (this == obj) {
            return true;
        }

     */
    public boolean isDeleted() {
        return isUpdated() && newToken.length() == 0;
    }

    @Override
    public int hashCode() {
        return Objects.hash(pos, reading, segmentation, token);
    }

    @Override
    public boolean equals(final Object obj) {
        if (this == obj) {
            return true;
        }

Wie in `item.model_dump(exclude_unset=True)`.

Das wird ein <abbr title="Dictionary – Zuordnungstabelle: In anderen Sprachen auch Hash, Map, Objekt, Assoziatives Array genannt">`dict`</abbr> erstellen, mit nur den Daten, die gesetzt wurden, als das `item`-Modell erstellt wurde, Defaultwerte ausgeschlossen.

  boolean equals(@Nullable Object object);

  /**
   * Returns the hash code for this multiset. This is defined as the sum of
   *
   * {@snippet :
   * ((element == null) ? 0 : element.hashCode()) ^ count(element)
   * }
   *
   * <p>over all distinct elements in the multiset. It follows that a multiset and its entry set
   * always have the same hash code.
   */
  @Override
  int hashCode();

  /**