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The framework API lets you register listeners on ConditionsManager or on any Conditions, but the Conditions implementation simply forwards registration to the ConditionsManager. The result is that if, for example, you register you your listener on two ConditionsSets, you will receive notifications of any conditions changes, not just those involving the two sets you are interested in, and you will receive them twice. For now, register all your listeners on the ConditionsManager to avoid this problem.
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