Fix Page Content

@@ -10,6 +10,7 @@
 - Import already defined form
 - Add support for deleted objects
 - Draw page content only if not empty
+- Fix Page Content
 
 ## 3.9.0
 

@@ -534,6 +534,10 @@ class PdfArray<T extends PdfDataType> extends PdfDataType {
     return false;
   }
 
+  bool get isEmpty => values.isEmpty;
+
+  bool get isNotEmpty => values.isNotEmpty;
+
   @override
   int get hashCode => values.hashCode;
 }

@@ -128,7 +128,7 @@ class PdfPage extends PdfObjectDict with PdfGraphicStream {
 
     if (contentList.values.length == 1) {
       params['/Contents'] = contentList.values.first;
-    } else if (contents.isNotEmpty) {
+    } else if (contentList.isNotEmpty) {
       params['/Contents'] = contentList;
     }