public override Ust VisitIfStatement(IfStatementSyntax node)
{
var condition = (Expression)base.Visit(node.Condition);
Statement trueStatement = (Statement)base.Visit(node.Statement);
Statement falseStatement = node.Else == null
? null
: (Statement)base.Visit(node.Else.Statement);
var result = new IfElseStatement(
condition,
trueStatement,
node.GetTextSpan())
{
FalseStatement = falseStatement
};
return(result);
}