class RuboCop::Cop::ConditionCorrector

def correct_negative_condition(corrector, node)
  condition = negated_condition(node)
  corrector.replace(node.loc.keyword, node.inverse_keyword)
  corrector.replace(condition, condition.children.first.source)
end

def negated_condition(node)
  condition = node.condition
  condition = condition.children.first while condition.begin_type?
  condition
end