returnAvailable
Return contract
`telion_api.CancellableOperation.add_done_callback` returns `None` according to the installed public signature.
Reference contract
| Field | Value | Description |
|---|---|---|
| symbol | telion_api.CancellableOperation.add_done_callback | — |
| type | None | — |
telion_api.CancellableOperation.add_done_callback returns None according to the installed public signature.
Contract
| Property | Value |
|---|---|
| symbol | telion_api.CancellableOperation.add_done_callback |
| type | None |