Rename

[felixfbecker]

https://github.com/Microsoft/language-server-protocol/blob/master/protocol.md#rename-request

[still-dreaming-1]

Other people can also add to this bounty if they want.

[echosa]

The spec documentation URL in the ticket description is out of date. This seems to be the new correct URL:

https://microsoft.github.io/language-server-protocol/specification#textDocument_rename