private static SyntaxToken?GetOpenParenToken(SyntaxNode node, ISyntaxFacts syntaxFacts)
{
var invocationExpression = node.DescendantNodes().Where(syntaxFacts.IsInvocationExpression).FirstOrDefault();
if (invocationExpression is null)
{
return(null);
}
var argumentListNode = syntaxFacts.GetArgumentListOfInvocationExpression(invocationExpression);
if (argumentListNode is null)
{
return(null);
}
syntaxFacts.GetPartsOfArgumentList(argumentListNode, out var openParenToken, out _, out _);
return(openParenToken);
}