title: SonarQube cognitive complexity metrics
body: <p><BR>
  we noticed there is a new rule in SonarQube java plugin about cognitive complexity, "Cognitive Complexity of methods should not be too high", but we didn't understood which metric is used by this rule.<BR>
  Is there a new metric or an older one, with another name, is re-used ?</p>
  
  <p>thanks</p>
  
  <p>Massimo </p>