Add a test for custom import placement support
Add a test for custom import placement support

graingert/isort,leepa/isort,pahko/isort,aequitas/isort,levic/isort,PyCQA/isort,gforcada/isort,tomviner/isort,jamesbroadhead/isort,wimglenn/isort,tomviner/isort,wimglenn/isort,adamchainz/isort,leepa/isort,jmullan/isort,graingert/isort,jmullan/isort,AbsoluteMSTR/isort,AbsoluteMSTR/isort,levic/isort,aequitas/isort,PyCQA/isort,gforcada/isort,pahko/isort,adamchainz/isort,jamesbroadhead/isort