update
Replaces the store-wide list, or the list of each channel. When a code is not valid, the mutation writes nothing and returns a ValidationError. The mutation writes the channels one by one. When a write fails for a different reason, the channels before it keep the new list, and the response has a top-level error. Send the request again: the write is idempotent.
Arguments
input
The channels and the new list.
Returns
errors
The errors of the update.
iSellTo
The new list of each written level, with the codes in upper case and sorted. null when the update has errors.