class RuboCop::Cop::Style::ClassMethods

def on_class(node)
  return unless node.body
  if node.body.defs_type?
    check_defs(node.identifier, node.body)
  elsif node.body.begin_type?
    node.body.each_child_node(:defs) { |def_node| check_defs(node.identifier, def_node) }
  end
end