/// <summary>
/// Returns a <see cref="SpanBasedStringBuilder"/> instance back to the pool if possible.
/// </summary>
/// <param name="stringBuilder">The instance to return.</param>
internal static void ReturnSpanBasedStringBuilder(SpanBasedStringBuilder stringBuilder)
{
stringBuilder.Clear();
_spanBasedStringBuilder = stringBuilder;
}
/// <summary>
/// Constructs a new InternableString wrapping the given SpanBasedStringBuilder.
/// </summary>
internal InternableString(SpanBasedStringBuilder builder)
{
_builder = builder.Builder;
_firstString = null;
}
