class RuboCop::Cop::Style::ModuleFunction

def each_wrong_style(nodes)
  nodes.each do |node|
    if style == :module_function && node == EXTEND_SELF_NODE
      yield node, MODULE_FUNCTION_MSG
    elsif style == :extend_self && node == MODULE_FUNCTION_NODE
      yield node, EXTEND_SELF_MSG
    end
  end
end