code: function buildArguments (argz) {
    var args = argz.cmd.split(' ')
    argz.cmd = args.shift()
    argz.args = union([], args || [], argz.args || [])
    return argz
  }
docs: > Build/structure already checked arguments.
  
  @param  {Object} `argz`
  @return {Object}
  @api private