open Ezcmd.V1 (old) or open Ezcmd.V2 (new)command by type sub, that should not be used directly. Instead, the function Ezcmd.sub should be used to build it. It's better for long term compatibility.?version argument to info and sub, to indicate at which version they appearedV2.EZCMD.RAWTYPES can be used to switch from abstract types to manifest types to generate documentation, with raw_env, raw_info and raw_sub