class RuboCop::Cop::Style::NegatedIf

def on_if(node)
  return if node.unless? || node.elsif? || node.ternary?
  return if correct_style?(node)
  message = message(node)
  check_negative_conditional(node, message: message) do |corrector|
    ConditionCorrector.correct_negative_condition(corrector, node)
  end
end