At least '``num:d``' value must ``constraint``
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Usages:
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 - **Then** *at least '1' value must be 'SOURCE'*

   :doc:`/features/SYS001_Cable-signal-flow`:21

 - **Then** *at least '1' value must be 'SINK'*

   :doc:`/features/SYS001_Cable-signal-flow`:22