@@ -138,6 +138,8 @@ At times, it may be desirable to execute a tool or workflow without waiting on t
output = tool.run(data_store, params, wait=False)
```
Note, when run in this manner, output will be `None`. In order to retrieve results, you can use `tool.get_results()`. If the tool has not finished execution, this will also return `None`. As soon as results are available, the method will provide the results, exactly like the blocking execution.
## Tool output
Tool execution often results in some type of output. In the Fractal example, the tool output is a singular image file. A tool can have multiple outputs and sometimes these outputs are grouped together in a collection. In `nova-galaxy`, a singular file is called a Dataset and a group of files is called a DatasetCollection. The `Dataset` and `DatasetCollection` classes support the following methods:
