"    Input:  {
              (target)               - target machine if needed (to correctly handle remote execution)

              (host_os)              - host OS (detect, if omitted)
              (os) or (target_os)    - OS module to check (if omitted, analyze host)
              (device_id)            - device id if remote (such as adb)
              (key)                  - {'remote_init' or 'remote_deinit'}
            }

    Output: {
              return       - return code =  0, if successful
                                         >  0, if error
              (error)      - error text if return > 0
            }

"