Swift: json decoding issues

[jkaster]

There are deserialization issues preventing full retrieval of API endpoint payloads in a variety of formats

• space/folder parent_id can be null but is specified as not null
• space/folder parent_id is specified as string but is passed as number
• dashboard_elements must be omitted from the field list for retrieving a dashboard because they don't deserialize.
• spaces/folders need to be omitted from the field list for dashboards and looks because they don't deserialize
  There are other issues as well, but this is enough to get started

[jkaster]

Since our existing consumers of this SDK haven't complained about this, perhaps it's no longer an issue any more. I created this ticket long before we modified Swift generation to handle both number or string IDs, so this could well be closable.