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In the same way that one can do a `if 'PATH' in os.environ.keys()` is there a way to test the names of blocks that have been stored? Is there a best practise use case here? Or is it just a case one has to catch the exception that is raised if it does not exist?

Currently you have to catch the exception on load

ah wait, try 
```blocks = await client.read_block_documents()```

<https://docs.prefect.io/api-ref/prefect/client/orion/#prefect.client.orion.OrionClient.read_block_types|https://docs.prefect.io/api-ref/prefect/client/orion/#prefect.client.orion.OrionClient.read_block_types>

<https://docs.prefect.io/api-ref/prefect/client/orion/#prefect.client.orion.OrionClient.read_block_documents|https://docs.prefect.io/api-ref/prefect/client/orion/#prefect.client.orion.OrionClient.read_block_documents>

Awesome! Thanks a lot for that -- I will give it a go :slightly_smiling_face: