If Check for serialized flag enums in Editor scripting

How do i write this

 **if( (spawnPointType & SpawnPointTypes.HiddenSpawn) == SpawnPointTypes.HiddenSpawn)
 {
 bla... blaa...
 }**

for seriazlied property in unity editor's OnInspectorGUI method.

  [CustomEditor(typeof(SpawnPoint))]
     
     public class SpawnPointEditor : Editor
     {
     SerializedObject myObj;
     public SerializedProperty spawnPointTypeMask;
     
     void OnEnable ()
             {
                     myObj = new SerializedObject (target);
                     spawnPointTypeMask = myObj.FindProperty ("spawnPointType");
 
             }
         public override void OnInspectorGUI ()
             {
                     serializedObject.Update ();
     
                     spawnPointTypeMask.intValue = (int)((SpawnPointTypes)EditorGUILayout.EnumMaskField
                                                 ("SpawnPointType", (SpawnPointTypes)spawnPointTypeMask.intValue));
                     
     //THE SAME IF CHECK FOR SERIALIZED ENUMS
 `// WHAT TO WRITE IN IF STATEMENT`
      **if( ? ? ? )
     {
     bla.. blaa..
     }**
     
             
                     serializedObject.ApplyModifiedProperties ();
             }
 }