When configuring an action between a List widget and other data sources, I get the option of setting a trigger/action connection.

I noticed that in the config.json, this is represented by an object fields.
"config": {
"messageUseDataSource": {
"dataSourceId": "dataSource_1-17de3f3e9e0-layer-18-dataView_4",
"mainDataSourceId": "dataSource_1-17de3f3e9e0-layer-18",
"dataViewId": "dataView_4",
"rootDataSourceId": "dataSource_1",
"fields": [
"name"
]
},
"actionUseDataSource": {
"dataSourceId": "dataSource_1-17de3f3e9df-layer-15",
"mainDataSourceId": "dataSource_1-17de3f3e9df-layer-15",
"rootDataSourceId": "dataSource_1",
"fields": [
"created_doc"
]
},I would assume from this that it may be possible to connect my trigger and action on the basis of multiple fields. Is there an "official" way to do this? I tried manually adding the extra field, but couldn't see that this did anything.
I ask because I have a situation in which it would be great to match either of two fields. Adding multiple filter actions to the widget just takes the last action listed.