Called to apply the filter, this function will provide a
git_writestream that will the original data will be
written to; with that data, the git_writestream will then
perform the filter translation and stream the filtered data
out to the next location.
Called to apply the filter, this function will provide a git_writestream that will the original data will be written to; with that data, the git_writestream will then perform the filter translation and stream the filtered data out to the next location.