Supplying a contribution
Contributions can be provided either by creating a patch:
git format-patch
and attaching that patch to a ticket, or by generating a Pull Request.
For further details regarding contributions, refer to the relevant sections of the https://cwiki.apache.org/confluence/display/NIFI/Contributor+Guide#ContributorGuide-providingCodeOrDocumentationContributionProvidingcodeordocumentationcontributions.