Property Validator

1. Create new folder and name it Editor.

2. Inside Editor folder create new class, ExampleValidator.cs

   public class ExampleValidator
   {
   
   }
   

3. Inherit from PropertyValidator class.

   public class ExampleValidator : PropertyValidator
   {
   
   }
   

4. Implement abstract method Validate.

   public class ExampleValidator : PropertyValidator
   {
       public override void Validate(SerializedProperty property)
       {
           // Property validation here...
       }
   }
   

5. Add ValidatorTarget attribute and set ExampleAttribute as target to this view.

   [ValidatorTarget(typeof(ExampleAttribute))]
   public class ExampleValidator : PropertyValidator
   {
       public override void Validate(SerializedProperty property)
       {
           // Property validation here...
       }
   }