/// Don't call this directly. use <see cref="DocumentExtensions.ReuseExistingSpeculativeModelAsync(Document, SyntaxNode, CancellationToken)"/> (or an overload).
/// Don't call this directly. use <see cref="DocumentExtensions.ReuseExistingSpeculativeModelAsync(Document, SyntaxNode, CancellationToken)"/> (or an overload).