Understand the current algorithm

external/src/main/java/de/epiceric/shopchest/external/info.txt

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+flags : (Register)
+- BentoBox : Create
+- PlotSquared (Old, New) : Create, Use (Player, Admin)
+- WorldGuard (v6, v7) : Create, Use (Player, Admin)
+
+listeners:
+- ASkyBlock : Create, Extend -> Check Owner or Members
+- BentoBox : Create, Extend -> Check Flags
+- GriefPrevention : Create, Extend -> Check Claim
+- IslandWorld : Create, Extend -> Check build access at loc
+- PlotSquared (Old, New) : Create, Extend -> Check flags | Plot clear, Plot Delete -> Remove shops
+- Towny : Create, Extend -> Check Towny ranks & Config
+- USkyBlock : Create, Extend -> Check Owner or Members
+- WorldGuard (v6, v7) -> Create, Extend -> Check flags
+
+listeners2:
+- AreaShop : Remove shops
+- BentoBox : Remove shops
+- WorldGuard (v6, v7) : Cancel WG message if the shop is usable
+
+Hooks:
+- AuthMe : Interact (Check authenticated)
+- PlotSquared (Old, New) : UseShop (Check Flags)
+- WorldGuard (v6, v7) : UseShop (Check Flags)
+
+
+External Manager :
+Load:
+- Load WorldGuard Flags
+
+Enable:
+- Load Towny, AuthMe, USkyBlock, ASkyBlock, IslandWorld, GriefPrevention, AreaShop, BentoBox
+  (Get their instances)
+- Register WorldGuard events listeners
+- Register PlotGuard flags
+- Register BentoBox flags
+- Register listeners2
+- Register listeners