YDK failed to generate bundle content for "grouping GROUP-IFSUB"

[xulleon]

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Expected Behavior

matching bundle code should be generated accordingly.

Current Behavior

when generate YDK Bundle In a Yang file, ydk failed to generate content for "grouping GROUP-IFSUB" in vrf yang file.

Steps to Reproduce

Your Script

Logs

Enable logging and post the logs below

sjc-ads-3460:142> ls -al Cisco-IOS-XR-um-vrf-cfg.yang
-rwxr-xr-x 1 leoxu eng 23788 Jul 16 12:04 Cisco-IOS-XR-um-vrf-cfg.yang

grouping GROUP-IFSUB {. <<<<<<<<<<<<<<<<<< do not see this section.
    leaf vrf {
      when "../a1:interface-name[not(starts-with(text(),'tunnel-'))] and " +
           "../a1:interface-name[not(starts-with(text(),'cem'))] and " +
           "../a1:interface-name[not(starts-with(text(),'nve'))]" {
        tailf:dependency '../a1:interface-name';
      }
      type string {
        length "1..32" {
          description "VRF name";
        }
      }
      description "Set VRF in which the interface operates";
    }
    container address-family {
      when "../a1:interface-name[not(starts-with(text(),'pw-ether'))] " +
       "and ../a1:interface-name[not(starts-with(text(),'pw-iw'))] " +
       "and ../a1:interface-name[not(starts-with(text(),'cem'))]" {
        tailf:dependency '../a1:interface-name';
      }
      description "AFI/SAFI configuration";
      container ipv4 {
        description "IPv4 address family";
        container multicast {
          presence "Indicates a multicast node is configured.";
          description "Multicast topology";
          container default-topology {
            presence "Indicates a default-topology node is configured.";
            description "Multicast default topology";
          }
          container topologies {
            description "Specify a non-default topology";
            list topology {
              key "topology-name";
              description "Specify a non-default topology";
              leaf topology-name {
                type string {
                  length "1..32" {
                    description "Topology name";
                  }
                }
               description "Specify a non-default topology";
              }
            }
          }
        }
      }
      container ipv6 {
        description "IPv6 address family";
        container multicast {
          presence "Indicates a multicast node is configured.";
          description "Multicast topology";
          container default-topology {
            presence "Indicates a default-topology node is configured.";
            description "Multicast default topology";
          }
          container topologies {
            description "Specify a non-default topology";
            list topology {
              key "topology-name";
              description "Specify a non-default topology";
              leaf topology-name {
                type string {
                  length "1..32" {
                    description "Topology name";
                  }
                }
                description "Specify a non-default topology";
              }
            }
          }
        }
      }
    }
  }
[pyats] sjc-ads-3460:179> ls -al /auto/atom-yang/pyats_dev/lib/python3.6/site-packages/ydk/models/cisco_iosxr_711/Cisco_IOS_XR_um_vrf_cfg.py
-rw-r--r-- 1 leoxu eng 175380 Jul 16 10:09 /auto/atom-yang/pyats_dev/lib/python3.6/site-packages/ydk/models/cisco_iosxr_711/Cisco_IOS_XR_um_vrf_cfg.py

        class Multicast(object):
            """
            Multicast topology

            .. attribute:: topologies

               Specify a non\-default topology
               **type**\:   :py:class:`Topologies <ydk.models.cisco_iosxr_711.Cisco_IOS_XR_um_vrf_cfg.AddressFamily.Ipv4.Multicast.Topologies>`

            """

            _prefix = 'um-vrf-cfg'
            _revision = '2019-06-10'

            def __init__(self):
                self.parent = None
                self.ylist_key_names = []

                self.topologies = AddressFamily.Ipv4.Multicast.Topologies()
                self.topologies.parent = self

            class Topologies(object):
                """
                Specify a non\-default topology

                .. attribute:: topology

                              Specify a non\-default topology
                              **type**\: list of    :py:class:`Topology <ydk.models.cisco_iosxr_711.Cisco_IOS_XR_um_vrf_cfg.AddressFamily.Ipv4.Multicast.Topologies.Topology>`

System Information

[ygorelik]

The group GROUP-IFSUB defined in Cisco-IOS-XR-um-vrf-cfg.yang is augmented in Cisco-IOS-XR-um-interface-cfg.yang in two containers: interface and interface-preconfigure:

  augment "/a1:interfaces/a1:interface" {
    uses GROUP-IFSUB;
  }

  augment "/a1:interfaces/a1:interface-preconfigure" {
    uses GROUP-IFSUB;
  }

Therefore corresponding generated code is added in the Cisco_IOS_XR_um_interface_cfg.py. Here is snippet from that code:

            class Ipv4(object):
                """
                IPv4 address family

                .. attribute:: multicast

                              Multicast topology
                              **type**\:   :py:class:`Multicast <ydk.models.cisco_iosxr_711.Cisco_IOS_XR_um_interface_cfg.Interfaces.Interface.AddressFamily.Ipv4.Multicast>`

                              **presence node**\: True

                """

                _prefix = 'um-vrf-cfg'
                _revision = '2019-06-10'

                def __init__(self):
                    self.parent = None
                    self.ylist_key_names = []

                    self.multicast = None

                class Multicast(object):
                    """
                    Multicast topology

                    .. attribute:: default_topology

                              Multicast default topology
                              **type**\:   :py:class:`DefaultTopology <ydk.models.cisco_iosxr_711.Cisco_IOS_XR_um_interface_cfg.Interfaces.Interface.AddressFamily.Ipv4.Multicast.DefaultTopology>`

                              **presence node**\: True

                    .. attribute:: topologies

                              Specify a non\-default topology
                              **type**\:   :py:class:`Topologies <ydk.models.cisco_iosxr_711.Cisco_IOS_XR_um_interface_cfg.Interfaces.Interface.AddressFamily.Ipv4.Multicast.Topologies>`

                    .. attribute:: _is_presence

                              Is present if this instance represents presence container else not
                              **type**\: bool

                    This class is a :ref:`presence class<presence-class>`

                    """

                    _prefix = 'um-vrf-cfg'
                    _revision = '2019-06-10'

                    def __init__(self):
                        self.parent = None
                        self.ylist_key_names = []

                        self._is_presence = True
                        self.default_topology = None
                        self.topologies = Interfaces.Interface.AddressFamily.Ipv4.Multicast.Topologies()
                        self.topologies.parent = self

                    class DefaultTopology(object):
                        """
                        Multicast default topology

                        .. attribute:: _is_presence

                             Is present if this instance represents presence container else not
                             **type**\: bool

                        This class is a :ref:`presence class<presence-class>`

                        """

                        _prefix = 'um-vrf-cfg'
                        _revision = '2019-06-10'

Everything is in place where it is supposed to be.