## setScheduleParameter() function

Immutably sets one scheduling parameter on a Schedule for a HealthcareService, so that calendar keeps it in place of the service-level parameter of the same name. Whatever the Schedule already holds at the sub-extension's url is replaced, and the SchedulingParameters extension is created if the Schedule has none for the service yet.

Untyped by design, taking any sub-extension of the shape the parameter calls for, for example `{ url: 'bufferBefore', valueDuration: { value: 10, unit: 'min' } }`. A parameter whose value is a nested structure rather than a single `value[x]` is worth a typed wrapper over this; `availability` has one in `@medplum/react-scheduling`. Pairs with `clearScheduleParameter` and `getScheduleParameters.

**Signature:**

```typescript
export declare function setScheduleParameter(schedule: Schedule, service: WithId<HealthcareService>, subextension: Extension): Schedule;
```

## Parameters

| Parameter   | Type                                                   | Description                                                        |
|-------------|--------------------------------------------------------|--------------------------------------------------------------------|
| schedule    | Schedule                                              | Schedule to update                                                |
| service     | [WithId](/content/docs/sdk/core.withid) <HealthcareService> | HealthcareService referenced by the parameters                     |
| subextension| Extension                                             | SchedulingParameters sub-extension to set                          |

**Returns:**

Schedule

A cloned Schedule containing the parameter

- [setScheduleParameter() function](/content/docs/sdk/core.setscheduleparameter#setscheduleparameter-function/index.html)  
- [Parameters](/content/docs/sdk/core.setscheduleparameter#parameters/index.html)