retrieve markdown table class from attributes

I would like to be able to write

| header1 | header2 |
|---------|---------|
| r1c1    | r1c2    |
| r2c1    | r2c2    |

: mycaption {.myclass}

and get the table class assigned to the table element, while removing it from the caption.

I know I can achieve it with fenced div blocks, but the shorthand version would be nice.

In the real world I am using pandoc-crossref, so my table usually looks like:

| header1 | header2 |
|---------|---------|
| r1c1    | r1c2    |
| r2c1    | r2c2    |

: mycaption {#tbl:id}

therefore I prefer the short version instead of wrapping the whole thing in extra div.

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