* high 32 bits of each long is the "prev" pointer, whereas the low 32 bits is the "succ" pointer
   * (pointing to the nextEntry entry in the linked list). The pointers in [size(), entries.length)
   * are all "null" (UNSET).
   *
   * <p>A node with "prev" pointer equal to {@code ENDPOINT} is the first node in the linked list,
   * and a node with "nextEntry" pointer equal to {@code ENDPOINT} is the last node.
   */

     * @return true if the flag is set, false otherwise
     */
    public boolean isFlagSet(final int flag) {
        return (flags & flag) == flag;
    }

    /**
     * Unsets a specific flag
     * @param flag the flag to unset
     */
    public void unsetFlag(final int flag) {
        flags &= ~flag;
    }

    /**
     * Sets a specific flag
     * @param flag the flag to set
     */

        // Password is null, so callback is not set (remains null)
        assertNull(pc.getPassword());
    }

    @Test
    @DisplayName("handle: null password leaves PasswordCallback unset")
    void testHandleWithNullPasswordDoesNotSet() throws Exception {
        // Spy to override getPasswordAsCharArray() to return null
        JAASAuthenticator spyAuth = spy(new JAASAuthenticator("DOM", "user", null));

But this guide shows you, more or less, how they are intended to be used.

///

### Using Pydantic's `exclude_unset` parameter { #using-pydantics-exclude-unset-parameter }

If you want to receive partial updates, it's very useful to use the parameter `exclude_unset` in Pydantic's model's `.model_dump()`.

Like `item.model_dump(exclude_unset=True)`.

/// info

      echo "JAVA_HOME is set to \"$JAVA_HOME\", but \"\$JAVA_HOME/bin/java\" does not exist." >&2
      exit 1
    fi
  fi
else
  JAVACMD="`\\unset -f command; \\command -v java`"

  if [ ! -x "$JAVACMD" ] ; then
    echo "The java(1) command does not exist in PATH nor is JAVA_HOME set, so Apache Maven cannot be started." >&2
    exit 1
  fi
fi

    steps:
      - name: Checkout
        uses: actions/checkout@v5

      - name: Configure JDK
        uses: actions/setup-java@v5
        with:
          distribution: 'zulu'
          java-version: 11

      - name: Configure JDK
        uses: actions/setup-java@v5
        with:
          distribution: 'zulu'
          java-version: 17

      - name: Setup Gradle
        uses: gradle/actions/setup-gradle@v4

        env:
          GITHUB_CONTEXT: ${{ toJson(github) }}
        run: echo "$GITHUB_CONTEXT"
      - uses: actions/checkout@v5
      - name: Set up Python
        uses: actions/setup-python@v5
        with:
          python-version: "3.11"
      - name: Setup uv
        uses: astral-sh/setup-uv@v6
        with:
          version: "0.4.15"
          enable-cache: true
          cache-dependency-glob: |

    steps:
      - name: git clone
        uses: actions/checkout@v5
      - id: setup-matrix
        run: echo "matrix=$(jq -c -f .github/workflows/extract-unit-test-split.jq .teamcity/subprojects.json)" >> $GITHUB_OUTPUT
      - name: setup java
        uses: actions/setup-java@v5
        with:
          distribution: temurin
          java-version: 17
      - id: determine-sys-prop-args
        uses: actions/github-script@v8
        with:

        env:
          GITHUB_CONTEXT: ${{ toJson(github) }}
        run: echo "$GITHUB_CONTEXT"
      - uses: actions/checkout@v5
      - name: Set up Python
        uses: actions/setup-python@v5
        with:
          python-version: "3.11"
      - name: Setup uv
        uses: astral-sh/setup-uv@v6
        with:
          version: "0.4.15"
          enable-cache: true
          cache-dependency-glob: |

permissions: {}

jobs:
  initial-build:
    runs-on: ubuntu-latest
    steps:
      - name: Set up JDK
        uses: actions/setup-java@dded0888837ed1f317902acf8a20df0ad188d165 # v5
        with:
          java-version: 17
          distribution: 'temurin'

      - name: Checkout maven
        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v4
        with:
          persist-credentials: false