Why did nifi-api not flow/process-groups/root?

[#1]

I want to get all the groups in Nifi with the url {http://host:port/flow/process-groups/root},why do rest not have the api?

[#2 · Accepted solution]

One can start with nifi-api/flow/process-groups/root and traverse all group references from there. Full API reference is available in the bundled help UI link with every NiFi node or here https://nifi.apache.org/docs/nifi-docs/rest-api/index.html