/// <summary>
/// Asserts that a collection of objects contains at least one object equivalent to another object.
/// <br />
/// <para>
/// <strong><b>Important:</b></strong> You cannot use this method to assert whether a collection contains a subset of another collection.
/// Use e.g. <see cref="BeSubsetOf"/> instead.
/// </para>
/// </summary>
/// <remarks>
/// <para>
/// By default, objects within the collection are seen as equivalent to the expected object when both object graphs have equally named properties with the same
/// value, irrespective of the type of those objects.
/// Notice that actual behavior is determined by the global defaults managed by <see cref="AssertionOptions"/>.
/// </para>
/// </remarks>
/// <param name="expectation">The expected element.</param>
/// <param name="because">
/// A formatted phrase as is supported by <see cref="string.Format(string,object[])" /> explaining why the assertion
/// is needed. If the phrase does not start with the word <i>because</i>, it is prepended automatically.
/// </param>
/// <param name="becauseArgs">
/// Zero or more objects to format using the placeholders in <paramref name="because"/>.
/// </param>