Storing custom data per position

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Storing custom data per position

Most other trading APIs allow the algorithm to store comments on per position. For example this way trading algorithm can "remember" which trades/positions are what (e.g. belong to which strategy etc.)

Is there at all any ability to store custom comments?

If not, can it be added?

I thought I can use dealReference, but it seems impossible to retrieve that for each /workingorders /positions.
If GET /workingorders & GET /positions would return custom specified dealReference that would be awesome.

Or create a new field that is consistently returned (or can be queried) for all workingorders, positions and confirms.