src/main/java/org/fest/assertions/error/ShouldContain.java
public static ErrorMessageFactory shouldContain(Object actual, Object expected, Object notFound) {
    return new ShouldContain(actual, expected, notFound);
  }
public static ErrorMessageFactory shouldContain(Object actual, Object expected, Object notFound) {
    return new ShouldContain(actual, expected, notFound);
  }
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}.