Query the latest value of the specified data source
| Return value | ||
| type | description | |
| float | The latest value, averaged over the last 5 seconds | |
| Parameters | ||
| name | type | description |
| session_id | session | valid session reference |
| self | VM | The VM |
| data_source | string | The data source to query |
| Errors | ||
| name | arguments | description |
- Message has only a synchronous version
- This is a custom message