private Utf8String TrimHelper(TrimType trimType)
{
Utf8Span trimmedSpan = this.AsSpan().TrimHelper(trimType);
// Try to avoid allocating a new Utf8String instance if possible.
// Otherwise, allocate a new substring wrapped around the resulting slice.
return((trimmedSpan.Length == this.Length) ? this : trimmedSpan.ToUtf8String());
}
