code: def show_instance(vm_name, call=None):
      '''
      Show the details of the existing instance.
      '''
      if call != 'action':
          raise SaltCloudSystemExit(
              'The show_instance action must be called with -a or --action.'
          )
      conn = get_conn()
      node = _expand_node(conn.ex_get_node(vm_name))
      __utils__['cloud.cache_node'](node, __active_provider_name__, __opts__)
      return nodf show_instance(vm_name, call=None):
      '''
      Show the details of the existing instance.
      '''
      if call != 'action':
          raise SaltCloudSystemExit(
              'The show_instance action must be called with -a or --action.'
          )
      conn = get_conn()
      node = _expand_node(conn.ex_get_node(vm_name))
      __utils__['cloud.cache_node'](node, __active_provider_name__, __opts__)
      return node
docs: Show the details of the existing instance.