/// <summary>
/// Writes the property name and raw bytes value (as a base 64 encoded JSON string) as part of a name/value pair of a JSON object.
/// </summary>
/// <param name="utf8PropertyName">The UTF-8 encoded property name of the JSON object to be written.</param>
/// <param name="bytes">The binary data to be written as a base 64 encoded JSON string as part of the name/value pair.</param>
/// <remarks>
/// The property name is escaped before writing.
/// </remarks>
/// <exception cref="ArgumentException">
/// Thrown when the specified property name is too large.
/// </exception>
/// <exception cref="InvalidOperationException">
/// Thrown if this would result in an invalid JSON to be written (while validation is enabled).
/// </exception>
public void WriteBase64String(ReadOnlySpan <byte> utf8PropertyName, ReadOnlySpan <byte> bytes)
{
JsonWriterHelper.ValidatePropertyAndBytes(utf8PropertyName, bytes);
WriteBase64Escape(utf8PropertyName, bytes);
SetFlagToAddListSeparatorBeforeNextItem();
_tokenType = JsonTokenType.String;
}