/// <summary>
/// Adds a validation message on top of the editor
/// </summary>
/// <param name="message"></param>
/// <param name="type"></param>
/// <param name="target"></param>
public void AddMessage(string message, MessageType type, UnityEngine.Object target, Func <bool> onValidate = null)
{
var contextMessage = new Validation(message, type.Convert(), target);
messages.Add(contextMessage);
}