public static bool AssertUniqueToEntityAttrib(Component comp, bool silent = false)
        {
            var tp = comp.GetType();
            var attrib = tp.GetCustomAttributes(typeof(UniqueToEntityAttribute), false).FirstOrDefault() as UniqueToEntityAttribute;

            if (attrib != null)
            {
                if (attrib.MustBeAttachedToRoot)
                {
                    if (!comp.HasTag(SPConstants.TAG_ROOT))
                    {
                        if(!silent) Assert(System.String.Format("(Entity:{1}) Component type {0} must be attached to the root gameObject.", tp.Name, comp.FindRoot().name), comp);
                        return true;
                    }
                }
                else
                {
                    var root = comp.FindRoot();

                    foreach (var child in root.GetAllChildrenAndSelf())
                    {
                        if (child != comp.transform && child.HasComponent(tp))
                        {
                            if(!silent) Assert(System.String.Format("(Entity:{1}) Only one component of type {0} must be attached to a root or any of its children.", tp.Name, root.name), comp);
                            return true;
                        }
                    }
                }
            }

            return false;
        }
        public static bool AssertRequireComponentInEntityAttrib(Component comp, out System.Type missingCompType, bool silent = false)
        {
            if (comp == null) throw new System.ArgumentNullException("comp");
            missingCompType = null;

            var tp = comp.GetType();
            foreach (var obj in tp.GetCustomAttributes(typeof(RequireComponentInEntityAttribute), true))
            {
                RequireComponentInEntityAttribute attrib = obj as RequireComponentInEntityAttribute;
                foreach (var reqType in attrib.Types)
                {
                    if (!comp.EntityHasComponent(reqType))
                    {
                        missingCompType = reqType;
                        if(!silent) Assert(System.String.Format("(Entity:{2}) Component type {0} requires the entity to also have a component of type {1}.", tp.Name, reqType.Name, comp.FindRoot().name), comp);
                        return true;
                    }
                }
            }

            return false;
        }