CreateParserOptionsCallback Delegate

https://w3c.github.io/trusted-types/dist/spec/#callbackdef-createparseroptionscallback: returns the options to use, or null to reject the operation. The options received by the callback have a SetHtmlUnsafeOptions.Sanitizer only when the options given to the sink have one (a new Sanitizer).

public delegate SetHtmlUnsafeOptions? CreateParserOptionsCallback(SetHtmlUnsafeOptions options, params object?[] arguments)