Input parameter without the "name" property in custom Integromat app - make.com

Question

I am trying to create a dropdown parameter (of type 'select') and it should contain two groups of nested parameters. But, I do not need to pass this top-level parameter to the API. I've tried removing the "name" property of this parameter, but then it doesn't remember the user's choice when the module is opened again. How can I include only the nested field in the request, but not the parent?
[
{
"type": "select",
"label": "Select",
"options": [
{
"label": "A",
"value": "a",
"nested": [
{
"name": "a",
"type": "text",
"label": "a nested"
}
]
},
{
"label": "B",
"value": "b",
"nested": [
{
"name": "b",
"type": "text",
"label": "b nested"
}
]
}
]
}
]

Answer 1

Adding to Petr Malimánek's answer, if you don't know ahead of time which parameters will need to be removed, you can pass their names as an input parameter, like so:
function omit(collection, ...fields) {
const result = {};
for (let key in collection) {
if (!fields.includes(key)) {
result[key] = collection[key];
}
}
return result;
}

Answer 2

It is not possible to omit the name or exclude the input parameter at this time. We're planning to add a new flag that allows you to exclude specific fields like this one but now you have to filter out this parameter in the communication of the module.
You can use a custom Javascript function where you can remove all redundant parameters.
E.g.
Communication:
{
"body": "{{prepareBody(body)}}"
}