How to retrieve associated SubscriptionLine items for a Subscription with REST API?

Using the api call /record/v1/subscription/{subscriptionId}, is it possible to get the associated SubscriptionLine items as well? Checking the metadata, I see that they should be part of the response but I’m not seeing subscriptionLine in the API response.

https://system.netsuite.com/help/helpcenter/en_US/APIs/REST_API_Browser/record/v1/2021.2/index.html#/definitions/subscriptionCollection

This is the response I get –

{
"links": [
{
"rel": "self",
"href": "https://{{REST_ENDPOINT}}/services/rest/record/v1/subscription/345"
}
],
"autoRenewal": false,
"billingAccount": {
"links": [
{
"rel": "self",
"href": "https://{{REST_ENDPOINT}}//services/rest/record/v1/billingaccount/964"
}
],
"id": "234",
"refName": "SECURITY SOLUTIONS"
},
"billingAccountStartDate": "2020-05-01",
"billingSchedule": {
"links": [
{
"rel": "self",
"href": "https://{{REST_ENDPOINT}}//services/rest/record/v1/billingschedule/4"
}
],
"id": "4",
"refName": "1 Quarterly Schedule"
},
"billingSubscriptionStatus": {
"id": "ACTIVE",
"refName": "Active"
},
"currency": {
"links": [
{
"rel": "self",
"href": "https://{{REST_ENDPOINT}}//services/rest/record/v1/currency/1"
}
],
"id": "1",
"refName": "USD"
},
"customer": {
"links": [
{
"rel": "self",
"href": "https://{{REST_ENDPOINT}}//services/rest/record/v1/customer/736"
}
],
"id": "7234",
"refName": "SECURITY SOLUTION"
},
"custrecord154": 234,
"custrecord160": 2343,
"estimatedRevRecEndDate": "2025-05-31",
"frequency": {
"id": "MONTHLY",
"refName": "Monthly"
},
"generateModificationElements": false,
"id": "345,
"idNumber": "2344",
"initialTerm": {
"links": [
{
"rel": "self",
"href": "https://{{REST_ENDPOINT}}//services/rest/record/v1/subscriptionterm/-101"
}
],
"id": "-101",
"refName": "Test Term"
},
"lastBillCycleDate": "2022-01-01",
"lastBillDate": "2022-01-01",
"name": "Generic SuiteBilling Subscription - 1/1/2020",
"nextBillCycleDate": "2022-01-01",
"priceBook": {
"links": [
{
"rel": "self",
"href": "https://{{REST_ENDPOINT}}//services/rest/record/v1/pricebook/1"
}
],
"id": "1",
"refName": "USD Price Book Monthly"
},
"priceInterval": {
"links": [
{
"rel": "self",
"href": "https://{{REST_ENDPOINT}}//services/rest/record/v1/subscription/3200/priceInterval"
}
]
},
"startDate": "2020-01-01",
"subscriptionPlan": {
"links": [
{
"rel": "self",
"href": "https://{{REST_ENDPOINT}}//services/rest/record/v1/subscriptionplan/335"
}
],
"id": "3123",
"refName": "Generic SuiteBilling Subscription"
},
"subscriptionPlanName": "Generic SuiteBilling Subscription",
"subscriptionRevision": 1,
"subsidiary": {
"links": [
{
"rel": "self",
"href": "https://{{REST_ENDPOINT}}//services/rest/record/v1/subsidiary/53"
}
],
"id": "343",
"refName": "Software, Inc."
}
}