Awake() for Editor- Custom Inspector

Any reason this doesn't work? I don't see why it wouldn't...

     using UnityEngine;
     using UnityEditor;
     using System.Collections;
     
     [CustomEditor(typeof(TargetClass))]
     
     public class TargetClassEditor : Editor
     {
         public void Awake()
         {
             Debug.Log("I'm Awake");
         }
     }

EDIT FOR CLARITY: How do I set my default values and such when extending the editor class for a custom inspector?