More skeleton methods

It's too late in the evening to get more done...

controller.go

@@ -25,3 +25,29 @@ func (dm *DataModel) NewProtocol(name string) {
 func (dm *DataModel) SaveNewProtocol(editorContent ProtocolEditor) {
 
 }
+
+func (dm *DataModel) GetPackageEditor() *PackageEditor {
+
+	return nil
+}
+
+func (dm *DataModel) SwitchToProtocolEditor() {
+
+}
+
+func (dm *DataModel) SyncPackageEditor(pkgedt *PackageEditor) {
+
+}
+
+func (dm *DataModel) GetPackageBytes() []byte {
+
+	return []byte{}
+}
+
+func (dm *DataModel) FromSaved(path string) {
+
+}
+
+func (dm *DataModel) SaveAsPcap(path string) {
+
+}

packageeditor.go

@@ -0,0 +1,7 @@
+package npc
+
+import "fyne.io/fyne/v2"
+
+type PackageEditor struct {
+	Representation *fyne.Container
+}

structure.go

@@ -42,4 +42,5 @@ type DataModel struct {
 	Name             string              // User defined name of his current work (filename later)
 	Protocols        []ProtocolStructure // List of protocols in order of the stack
 	Data             []FieldValue        // Data of the fields of all protocols
+	ProtocolCreation bool
 }