I was facing some issues with a maven dependency, then I found the the right command to get the specific module pom.xml I was looking for.
As usually I copy it here as a reminder for the future (granted taht we have one, given the situation in North Korea)
$ find . -name pom.xml -exec grep -l jackson {} \;
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2> /dev/null
to suppress noising error messages that can arise for directories producing errors when going into