API discovery using subnets

We have Python scripts that launch a network discovery using BulkList, but we'd like to expand it to use Subnets as well. I have not found anything regarding this in my online searching, but hoping I'm just missing something obvious. Is this possible via API?

Here's a snippet:

corePluginContext = {    'BulkList': bulklist_hosts,    'Credentials': snmp_discovery_creds,    'WmiRetriesCount': 0,    'WmiRetryIntervalMiliseconds': 1000,    'IsDiscoveryForVimEnabled': False
}

I'm hoping it's just a matter of having something like 'Subnets': (subnets or Python variable)

I'm sure this must be documented somewhere, and I'm just not finding it.

Thanks in advance!!