Setup.

Editor/EditorExample.cs

@@ -1,6 +1,6 @@
 using UnityEngine;
 using UnityEditor;
 
-namespace COMPANYNAME.PACKAGENAME.Editor
+namespace tech_art_outsource.vertex_animation.Editor
 {
 }

Editor/tech_art_outsource.vertex_animation.Editor.asmdef

@@ -1,7 +1,7 @@
 {
-    "name": "COMPANYNAME.PACKAGENAME.Editor",
+    "name": "tech_art_outsource.vertex_animation.Editor",
     "references": [
-        "COMPANYNAME.PACKAGENAME"
+        "tech_art_outsource.vertex_animation"
     ],
     "includePlatforms": [
         "Editor"