Biertray
 These are all the keys and their possible values for the article Biertray.
      These keys will also be in the response of a Get article request, along with the default keys id and creation_datetime.
      Note that optional keys as size_custom_width and size_custom_height become mandatory when a custom size is chosen.
      
      
| Key | Possible values | Datatype | Optional | Info | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| number | An integer. | Int |   | |||||||
| copies | An integer. | Int |   | |||||||
| size | 
 | String | ||||||||
| papertype | 
 | String | ||||||||
| printside | 
 | String | ||||||||
| check_doc | 
 | String | ||||||||
| delivery_method | 
 | String | ||||||||
| comment |  | String | ||||||||
| production_method | 
 | String | Optional | 
