public BoundIfStatement(IfStatementSyntax syntax, BoundIfPart ifPart, IReadOnlyList <BoundElseIfPart> elseIfParts, BoundElsePart elsePartOpt)
{
Debug.Assert(!syntax.IsDefault(), "'syntax' must not be null.");
Debug.Assert(!ifPart.IsDefault(), "'ifPart' must not be null.");
Debug.Assert(!elseIfParts.IsDefault(), "'elseIfParts' must not be null.");
this.Syntax = syntax;
this.IfPart = ifPart;
this.ElseIfParts = elseIfParts;
this.ElsePartOpt = elsePartOpt;
}