public void visitIf(TypedTree node) {
   this.builder.beginStatement("if");
   this.builder.push("(");
   this.visit(node.get(_cond));
   this.builder.push(")");
   this.visitStatement(node.get(_then));
   this.builder.endStatement("");
   if (node.has(_else)) {
     this.builder.beginStatement("else");
     this.visitStatement(node.get(_else));
     this.builder.endStatement("");
   }
 }