private BlockSyntax AddReturnStatement(BlockSyntax node)
{
var leadingTrivia = node.Statements.Count > 0
? node.Statements[0].GetLeadingWhitespace()
: Whitespace(node.GetLeadingWhitespace().ToFullString() + _transformResult.IndentTrivia.ToFullString());
return(node.AddStatements(GetReturnTaskCompleted().WithLeadingTrivia(TriviaList(leadingTrivia))));
}