[Unity] Gets the target value of a property. In other words, if you have a serialized class and you want to get it's instance from the property, use this method.

SerializedObjectUtility.cs

using UnityEditor;

public static class SerializedObjectUtility
{
    public static object GetTargetValue(this SerializedProperty property)
    {
        var targetObject = property.serializedObject.targetObject;
        var field = targetObject.GetType().GetField(property.propertyPath);

        return field?.GetValue(targetObject);
    }
}