REST API for workflow documentation errors and omissions

https://docs.atlassian.com/jira/REST/6.4.5/#d2e10

1. No output documentation for this API
2. in the documentation header, just below the link listed above is another link that does not work: http://example.com:8080/jira/rest/api/2/workflow/api/2/transitions. Is there an api for transitions? Is, can the link be updated to point to a section documenting the api