Replaces all references to the group with those listed in the request body, unlinking all un-listed resources (where possible).

For example, to link stream_1 to the group my_group and unlink all other streams from the group, issue the following PUT request to /groups/my_group/references/streams:

{
  "references": [
    "stream_1"
  ]
}

All other streams will be unlinked from my_group, unless permissions prevent them from being unlinked.