Ok this is actually not as easy as it should be. The problem is the conctact_vector: when dumping to json, the complex dtype is lost and this messes up reloading.

Since we discussed about it, I propose we make a change as follows (but we keep back-compatibility):

• instead of adding the contact_vector property, we add individual properties as _probe_{contact_vector_field}
• we add helper functions to the baserecordingsnippet to go from list of properties to complex array and back

@samuelgarcia @zm711 what do you think?

instead of adding the contact_vector property, we add individual properties as probe{contact_vector_field}

+1 on this.

I feel that contact_vector is not as clear as probe.

This is something we should discuss at our next meeting :)