class RuboCop::Cop::Style::AccessModifierDeclarations

def find_corresponding_def_node(node)
  if access_modifier_with_symbol?(node)
    method_name = node.arguments.first.value
    node.parent.each_child_node(:def).find do |child|
      child.method?(method_name)
    end
  else
    node.arguments.first
  end
end