class ShouldContain extends BasicErrorMessageFactory {

  /**
   * Creates a new <code>{@link ShouldContain}</code>.
   * @param actual the actual value in the failed assertion.
   * @param expected values expected to be in {@code actual}.
   * @param notFound the values in {@code expected} not found in {@code actual}.
   * @param comparisonStrategy the {@link ComparisonStrategy} used to evaluate assertion.
   * @return the created {@code ErrorMessageFactory}.
   */
  public static ErrorMessageFactory shouldContain(Object actual, Object expected, Object notFound,
                                                  ComparisonStrategy comparisonStrategy) {
    return shouldContain(actual.getClass(), actual, expected, notFound, comparisonStrategy);
  }

  /**
   * Creates a new <code>{@link ShouldContain}</code>.
   * @param clazz the actual value class in the failed assertion.
   * @param actual the actual value in the failed assertion.
   * @param expected values expected to be in {@code actual}.
   * @param notFound the values in {@code expected} not found in {@code actual}.
   * @param comparisonStrategy the {@link ComparisonStrategy} used to evaluate assertion.
   * @return the created {@code ErrorMessageFactory}.
   */
  public static ErrorMessageFactory shouldContain(Class<?> clazz, Object actual, Object expected, Object notFound,
                                                  ComparisonStrategy comparisonStrategy) {<FILL_FUNCTION_BODY>}

  /**
   * Creates a new <code>{@link ShouldContain}</code>.
   * @param actual the actual value in the failed assertion.
   * @param expected values expected to be in {@code actual}.
   * @param notFound the values in {@code expected} not found in {@code actual}.
   * @return the created {@code ErrorMessageFactory}.
   */
  public static ErrorMessageFactory shouldContain(Object actual, Object expected, Object notFound) {
    return shouldContain(actual, expected, notFound, StandardComparisonStrategy.instance());
  }

  public static ErrorMessageFactory directoryShouldContain(File actual, List<File> directoryContent, String filterDescription) {
    return new ShouldContain(actual, toFileNames(directoryContent), filterDescription);
  }

  private static List<String> toFileNames(List<File> files) {
    return files.stream()
                .map(File::getName)
                .collect(toList());
  }

  public static ErrorMessageFactory directoryShouldContain(Path actual, List<Path> directoryContent, String filterDescription) {
    return new ShouldContain(actual, toPathNames(directoryContent), filterDescription);
  }

  private static List<String> toPathNames(List<Path> files) {
    return files.stream()
                .map(Path::toString)
                .collect(toList());
  }

  private ShouldContain(Object actual, Object expected, Object notFound, ComparisonStrategy comparisonStrategy,
                        GroupTypeDescription groupTypeDescription) {
    super("%nExpecting " + groupTypeDescription.getGroupTypeName()
          + ":%n  %s%nto contain:%n  %s%nbut could not find the following " + groupTypeDescription.getElementTypeName()
          + ":%n  %s%n%s", actual, expected, notFound,
          comparisonStrategy);
  }

  private ShouldContain(Object actual, List<String> directoryContent, String filterDescription) {
    // not passing directoryContent and filterDescription as parameter to avoid AssertJ default String formatting
    super("%nExpecting directory:%n" +
          "  %s%n" +
          "to contain at least one file matching " + escapePercent(filterDescription) + " but there was none.%n" +
          "The directory content was:%n  " + escapePercent(directoryContent.toString()),
          actual);
  }

}

    GroupTypeDescription groupTypeDescription = getGroupTypeDescription(clazz);
    return new ShouldContain(actual, expected, notFound, comparisonStrategy, groupTypeDescription);
  
<methods>public transient void <init>(java.lang.String, java.lang.Object[]) ,public java.lang.String create(org.assertj.core.description.Description, org.assertj.core.presentation.Representation) ,public java.lang.String create(org.assertj.core.description.Description) ,public java.lang.String create() ,public boolean equals(java.lang.Object) ,public int hashCode() ,public java.lang.String toString() <variables>protected final non-sealed java.lang.Object[] arguments,protected final non-sealed java.lang.String format,org.assertj.core.error.MessageFormatter formatter