     mainDiv.expandWidth = true
     mainDiv.expandHeight = true
 
-    fn(div: &mainDiv)
+    try fn(div: &mainDiv)
 
     timeout(0)
 


  public init() { }

  public mutating func span(args: Any..., fn: ((inout NCSpan) -> Void)? = nil) {
    var span = NCSpan()
    span.addArgs(args)
    if let af = fn {
      af(&span)
    }
    children.append(span)
  }

        children.append(v as! NCText)
      } else if v is NCSpan {
        children.append(v as! NCSpan)
      } else if v is NCDiv {
        children.append(v as! NCDiv)
      }
    }
  }
