content: from django.db.models import Q
  
  
  # models values for ContentTypes which may be CircuitTermination termination types
  CIRCUIT_TERMINATION_TERMINATION_TYPES = (
      'region', 'sitegroup', 'site', 'location', 'providernetwork',
  )
  
  CIRCUIT_GROUP_ASSIGNMENT_MEMBER_MODELS = Q(
      app_label='circuits',
      model__in=['circuit', 'virtualcircuit']
  )
  