下面列出了此方法的常见用例。将鼠标悬停在用例上可查看其说明，点击用例可在 API Explorer 中加载示例参数值。您可以打开全屏 API Explorer，查看会动态更新的代码示例，以反映在 Explorer 中输入的参数值。

下表显示了此方法的常见用例。您可以点击用例名称，在 API Explorer 中加载示例参数值。或者，您也可以在全屏 API Explorer 中查看用例的代码示例，只需点击用例名称下方的代码图标即可。在全屏界面中，您可以更新参数和属性值，并且代码示例会动态更新以反映您输入的值。

Use cases
list (by channel ID)	This example retrieves a list of channels that the specified channel subscribes to. In this example, the API response lists channels to which the GoogleDevelopers channel subscribes.
list (my subscriptions)	This example uses the mine parameter to retrieve a list of channels that subscribe to the authenticated user's channel.
check whether a subscription exists	This example determines whether the user authorizing the API request subscribes to the channel that the forChannelId parameter identifies. To check whether another channel (instead of the authorizing user's channel) subscribes to the specified channel, remove the mine parameter from this request and add the channelId parameter instead. In this example, the API response contains one item if you subscribe to the GoogleDevelopers channel. Otherwise, the request does not return any items.