old_contents: from plstackapi.core.models.plcorebase import PlCoreBase
  from plstackapi.core.models.deploymentnetwork import DeploymentNetwork
  from plstackapi.core.models.site import Site
  from plstackapi.core.models.site import SitePrivilege
  from plstackapi.core.models.image import Image
  from plstackapi.core.models.pluser import PLUser
  from plstackapi.core.models.role import Role
  from plstackapi.core.models.key import Key
  from plstackapi.core.models.node import Node
  from plstackapi.core.models.slice import Slice
  from plstackapi.core.models.slice import SliceMembership
  from plstackapi.core.models.sliver import Sliver
  from plstackapi.core.models.subnet import Subnet
  
  
new_contents: from plstackapi.core.models.plcorebase import PlCoreBase
  from plstackapi.core.models.deploymentnetwork import DeploymentNetwork
  from plstackapi.core.models.site import Site
  from plstackapi.core.models.site import SitePrivilege
  from plstackapi.core.models.image import Image
  from plstackapi.core.models.pluser import PLUser
  from plstackapi.core.models.role import Role
  from plstackapi.core.models.key import Key
  from plstackapi.core.models.node import Node
  from plstackapi.core.models.slice import Slice
  from plstackapi.core.models.slice import SliceMembership
  from plstackapi.core.models.sliver import Sliver
  
  
subject: remove reference to subnet