fix

src/Visual_DVM_2021/UI/Main/SapforPackageForm.form

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<form xmlns="http://www.intellij.com/uidesigner/form/" version="1" bind-to-class="Visual_DVM_2021.UI.Main.SapforPackageForm">
+  <grid id="27dc6" binding="content" layout-manager="BorderLayout" hgap="0" vgap="0">
+    <constraints>
+      <xy x="20" y="20" width="500" height="400"/>
+    </constraints>
+    <properties/>
+    <border type="none"/>
+    <children/>
+  </grid>
+</form>

src/Visual_DVM_2021/UI/Main/SapforPackageForm.java

@@ -0,0 +1,10 @@
+package Visual_DVM_2021.UI.Main;
+import Common.UI.Windows.Dialog.DialogFields;
+
+import javax.swing.*;
+public class SapforPackageForm implements DialogFields {
+    private JPanel content;
+    public JPanel getContent() {
+        return content;
+    }
+}