code: def _get_tunnel_context_mask(address_translations=False,
                               internal_subnets=False,
                               remote_subnets=False,
                               static_subnets=False,
                               service_subnets=False):
      
      entries = ['id',
                 'accountId',
                 'advancedConfigurationFlag',
                 'createDate',
                 'customerPeerIpAddress',
                 'modifyDate',
                 'name',
                 'friendlyName',
                 'internalPeerIpAddress',
                 'phaseOneAuthentication',
                 'phaseOneDiffieHellmanGroup',
                 'phaseOneEncryption',
                 'phaseOneKeylife',
                 'phaseTwoAuthentication',
                 'phaseTwoDiffieHellmanGroup',
                 'phaseTwoEncryption',
                 'phaseTwoKeylife',
                 'phaseTwoPerfectForwardSecrecy',
                 'presharedKey']
      if address_translations:
          entries.append('addressTranslations[internalIpAddressRecord[ipAddress],'
                         'customerIpAddressRecord[ipAddress]]')
      if internal_subnets:
          entries.append('internalSubnets')
      if remote_subnets:
          entries.append('customerSubnets')
      if static_subnets:
          entries.append('staticRouteSubnets')
      if service_subnets:
          entries.append('serviceSubnets')
      return '[mask[{}]]'.format(','.join(entries))
docs: Yields a mask object for a tunnel context.
  
      All exposed properties on the tunnel context service are included in
      the constructed mask. Additional joins may be requested.
  
      :param bool address_translations: Whether to join the context's address
             translation entries.
      :param bool internal_subnets: Whether to join the context's internal
             subnet associations.
      :param bool remote_subnets: Whether to join the context's remote subnet
             associations.
      :param bool static_subnets: Whether to join the context's statically
             routed subnet associations.
      :param bool service_subnets: Whether to join the SoftLayer service
             network subnets.
      :return string: Encoding for the requested mask object.