Can i share variable within instances of model plugin?

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I am spawning objects that fall into virtual bin. I created model plugin for objects, that reads their positions. From what i understand each plugin is running separately for each model a they don't share any variables.

My goal is to delete last XY spawned objects if one of them is outside of the bin. Is there any way that i can share for example boolean within all instances of plugin, so when one object is out, other objects are also aware of this? thanks