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log 
action_wheel Miscellaneous Types
Miscellaneous Enums
EntityPoses ItemRenderTypes KeyIDs Keybinds LoopModes ParentTypes PlayStates PostEffects RenderTypes TextureTypesClientAPI.getUsedMemory
Example by ChloeSpacedOut:
events.TICK:register(function()
log(client.getUsedMemory())
end)
-- returns memory in bytes