/// <summary>
/// Initializes a new instance of the <see cref="ImmutableDictionary{TKey, TValue}.HashBucket"/> struct.
/// </summary>
/// <param name="firstElement">The first element.</param>
/// <param name="additionalElements">The additional elements.</param>
private HashBucket(KeyValuePair <TKey, TValue> firstElement, ImmutableList <KeyValuePair <TKey, TValue> > .Node additionalElements = null)
{
_firstValue = firstElement;
_additionalElements = additionalElements ?? ImmutableList <KeyValuePair <TKey, TValue> > .Node.EmptyNode;
}
/// <summary>
/// Returns an immutable copy of the current contents of the builder's collection.
/// </summary>
/// <param name="builder">The builder to create the immutable list from.</param>
/// <returns>An immutable list.</returns>
public static ImmutableList <TSource> ToImmutableList <TSource>(this ImmutableList <TSource> .Builder builder)
{
Requires.NotNull(builder, nameof(builder));
return(builder.ToImmutable());
}
