feat: GetChildren slotName argument

DEV_CHANGELOG.txt

@@ -5,6 +5,9 @@ types 모듈이 삭제되며 init.lua 에 통합됨
 이제 extend 에 대해서 Init(self) self 안에 props 기능이 내장되어있음
 
 TODO: slot 기능 구현
-spring 구현
+
+TODO: spring 구현
 
 TODO: !ChildRemoved 구현
+
+TODO: AdvancedTween 을 submodule 로 변경

src/class.lua

@@ -167,7 +167,8 @@ function module.init(shared)
 				local setValue,tween = value:CalcWithNewValue(item,newValue,key)
 				if tween then
 					if not advancedTween then
-						return warn "[QUAD] module 'AdvancedTween' needs to be loaded for tween properties but it is not found on 'src.libs'. you should adding that to src.libs directory"
+						warn "[QUAD] Failed to execute register handler function. (Real Instance was not updated)"
+						return warn "[QUAD] module 'AdvancedTween' needs to be loaded for tween properties but it is not found on 'src.libs'. you should adding that to src.libs directory.\nPossible reason : Cloned repository without recursive option. => 'git submodule init ; git submodule update' to get submodules"
 					end
 					-- local ended, onStepped
 					-- if tween.Ended then
@@ -445,11 +446,18 @@ function module.init(shared)
 			thisSignal:Fire(value)
 		end
 
-		function this:GetChildren()
+		function this:GetChildren(slotName)
-			local children = rawget(self,"__child")
+			if slotName then
-			if not children then
+				local slot = rawget(slotName,"__slot")
-				return {}
+				if not slot then return {} end
+				local newSlot = {}
+				for _,v in pairs(slot) do
+					insert(newSlot,v)
+				end
+				return slot
 			end
+			local children = rawget(self,"__child")
+			if not children then return {} end
 			local newChildren = {}
 			for _,v in pairs(children) do
 				insert(newChildren,v)