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The requiredExperienceLevel key specifies that an event is only executed for the indicated experience level. Experience levels are defined in the application configuration as a list, e.g. "Beginner;Intermediate;Expert". This key can be specified multiple times if the event should be executed for multiple levels (e.g. both Beginner and Intermediate). In a frame one refers to these levels by a number (starting with 0), e.g. if an event is only to be executed for experts, then this is configured as
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