Callouts are really useful and it helps to have standard ones. This component does just that.
Available types are: note, tip, warning (or warn),
important, and caution. Others are likely to be added as well.
note type.
If you specify any type attribute and a title attribute,
the title replaces the heading.
This example also shows multiple paragraphs.
tip type.
warning type.
important type.
caution type.
We can set a custom heading icon as well (only text allowed for now, use emoji's).