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docs: concepts callbacks fix admonition (#22048)

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Correct the admonition text
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Eugene Yurtsev 2024-05-22 20:33:28 -04:00 committed by GitHub
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docs/docs/concepts.mdx
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@ -535,10 +535,15 @@ of the object.
If you're creating a custom chain or runnable, you need to remember to propagate request time
callbacks to any child objects.
:::important
For code running python >=3.11, LangChain is able to automatically propagate
request time callbacks to child objects. This feature was added since
added as users forgetting to propagate callbacks was a common problem.
:::important Async in Python<=3.10
Any `RunnableLambda`, a `RunnableGenerator`, or `Tool` that invokes other runnables
and is running async in python<=3.10, will have to propagate callbacks to child
objects manually. This is because LangChain cannot automatically propagate
callbacks to child objects in this case.
This is a common reason why you may fail to see events being emitted from custom
runnables or tools.
:::
## Techniques