LDEV-1978: Check for Lesson's allowed users rather than ToolSession's ones, because an unathorised access to some Tool's Learner creates a s…
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LDEV-1978: Check for Lesson's allowed users rather than ToolSession's ones, because an unathorised access to some Tool's Learner creates a separate ToolSession for that singe user (so he is an allowed person).
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