Can I add Recovery Behaviors as plugins ?

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Hello Everyone, I'm making my first steps with FlexBE, I have implemented a functionnel architecture to move the robot, I'm working on adding some recovery behaviors, and I want to know if it is possible to keep the same architecture and add the Recovery behaviors as plugins, every time I need A recovery I can call it without modifiying the global architecture ? or I must add it to the HFSM so I can use it ? Thank you,