> ## Documentation Index
> Fetch the complete documentation index at: https://docs.prefect.io/llms.txt
> Use this file to discover all available pages before exploring further.
# task_workers
# `prefect.server.models.task_workers`
## Functions
### `observe_worker`
```python theme={null}
observe_worker(task_keys: List[TaskKey], worker_id: WorkerId) -> None
```
### `forget_worker`
```python theme={null}
forget_worker(worker_id: WorkerId) -> None
```
### `get_workers_for_task_keys`
```python theme={null}
get_workers_for_task_keys(task_keys: List[TaskKey]) -> List[TaskWorkerResponse]
```
### `get_all_workers`
```python theme={null}
get_all_workers() -> List[TaskWorkerResponse]
```
## Classes
### `TaskWorkerResponse`
### `InMemoryTaskWorkerTracker`
**Methods:**
#### `forget_worker`
```python theme={null}
forget_worker(self, worker_id: WorkerId) -> None
```
#### `get_all_workers`
```python theme={null}
get_all_workers(self) -> List[TaskWorkerResponse]
```
#### `get_workers_for_task_keys`
```python theme={null}
get_workers_for_task_keys(self, task_keys: List[TaskKey]) -> List[TaskWorkerResponse]
```
#### `observe_worker`
```python theme={null}
observe_worker(self, task_keys: List[TaskKey], worker_id: WorkerId) -> None
```
#### `reset`
```python theme={null}
reset(self) -> None
```
Testing utility to reset the state of the task worker tracker