`contact` | `dict` | 노출된 API에 대한 연락처 정보입니다. 여러 필드를 포함할 수 있습니다. <details><summary><code>contact</code> 필드</summary><table><thead><tr><th>매개변수</th><th>타입</th><th>설명</th></tr></thead><tbody><tr><td><code>name</code></td><td><code>str</code></td><td>연락처 인물/조직의 식별명입니다.</td></tr><tr><td><code>url</code></td><td><code>str</code></td><td>연락처 정보가 담긴 URL입니다. URL 형식이어야 합니다.</td></tr><tr><td><code>email</code></td><td><code>str</code></td><td>연락처 인물/조직의 이메일 주소입니다. 이메일 주소 형식이어야 합니다.</td></tr></tbody></table></details>...

 *   <li>When a cache lookup encounters an existing cache entry {@code hitCount} is incremented.
 *   <li>When a cache lookup first encounters a missing cache entry, a new entry is loaded.
 *       <ul>
 *         <li>After successfully loading an entry {@code missCount} and {@code loadSuccessCount}
 *             are incremented, and the total loading time, in nanoseconds, is added to {@code
 *             totalLoadTime}.

 * <td ><code>
 *  smb://host/share/foo/
 * </code></td>
 * <td ><code>
 *  ../.././.././../foo/
 * </code></td>
 * <td><code>
 *  smb://host/foo/
 * </code></td>
 * </tr>
 *
 * <tr>
 * <td ><code>
 *  smb://host/share/zig/zag
 * </code></td>
 * <td ><code>
 *  /
 * </code></td>
 * <td><code>
 *  smb://host/
 * </code></td>
 * </tr>
 *
 * <tr>
 * <td ><code>

   *
   * <p>If {@code !range.contains(k)}, {@link #get(Comparable) get(k)} will return the same result
   * before and after a call to {@code remove(range)}. If {@code range.contains(k)}, then after a
   * call to {@code remove(range)}, {@code get(k)} will return {@code null}.
   */
  void remove(Range<K> range);

  /**

  };

  /**
   * Returns {@code n} choose {@code k}, also known as the binomial coefficient of {@code n} and
   * {@code k}, or {@link Long#MAX_VALUE} if the result does not fit in a {@code long}.
   *
   * @throws IllegalArgumentException if {@code n < 0}, {@code k < 0}, or {@code k > n}
   */
  public static long binomial(int n, int k) {
    checkNonNegative("n", n);

 * of <code>0x001200A9</code> which doesn't have the
 * <code>FILE_WRITE_DATA</code> bit on (bit <code>0x00000002</code>). Actually, this isn't quite correct. If
 * <code>WNET\alice</code> is in the local <code>Administrators</code> group the access check
 * will succeed because the inherited ACE allows local <code>Administrators</code>
 * both <code>FILE_READ_DATA</code> and <code>FILE_WRITE_DATA</code> access.
 */

  }

  /**
   * Returns a string, of length at least {@code minLength}, consisting of {@code string} appended
   * with as many copies of {@code padChar} as are necessary to reach that length. For example,
   *
   * <ul>
   *   <li>{@code padEnd("4.", 5, '0')} returns {@code "4.000"}
   *   <li>{@code padEnd("2010", 3, '!')} returns {@code "2010"}
   * </ul>
   *

 * supplied by the user of the class. For example, {@code Multiset.Entry.getElement()} returns
 * {@code @ParametricNullness E}, which means:
 *
 * <ul>
 *   <li>{@code getElement} on a {@code Multiset.Entry<@NonNull String>} returns {@code @NonNull
 *       String}.
 *   <li>{@code getElement} on a {@code Multiset.Entry<@Nullable String>} returns {@code @Nullable
 *       String}.
 * </ul>
 *

 * supplied by the user of the class. For example, {@code Multiset.Entry.getElement()} returns
 * {@code @ParametricNullness E}, which means:
 *
 * <ul>
 *   <li>{@code getElement} on a {@code Multiset.Entry<@NonNull String>} returns {@code @NonNull
 *       String}.
 *   <li>{@code getElement} on a {@code Multiset.Entry<@Nullable String>} returns {@code @Nullable
 *       String}.
 * </ul>
 *

	var langs []Language
	if err := DB.Find(&langs, "code = ?", lang.Code).Error; err != nil {
		t.Errorf("no error should happen when find languages with code, but got %v", err)
	} else if len(langs) != 1 {
		t.Errorf("should only find only 1 languages, but got %+v", langs)
	}

	lang3 := Language{Code: "upsert", Name: "Upsert"}
	if err := DB.Clauses(clause.OnConflict{
		Columns:   []clause.Column{{Name: "code"}},