private AttributeArgumentSyntax GetAttributeArgumentNodeToBeReplaced(SyntaxNode root, TextSpan diagnosticSpan)
{
SyntaxNode node = root?.FindNode(diagnosticSpan);
return(node switch
{
LiteralExpressionSyntax literal
when literal.Kind() == SyntaxKind.NumericLiteralExpression &&
literal.Token.Value is int => literal.Parent <AttributeArgumentSyntax>(),
IdentifierNameSyntax namedConstant => namedConstant.Parent <AttributeArgumentSyntax>(),
MemberAccessExpressionSyntax memberAccess => memberAccess.Parent <AttributeArgumentSyntax>(),
AttributeArgumentSyntax attributeArgument => attributeArgument,
AttributeSyntax attribute => SearchForAttributeArgumentToBeReplaced(attribute),
_ => null,
});
