Added a class key definition for InfoSource.
Added a class key definition for InfoSource.



Former-commit-id: 03a04788172d8f087e402810e4c41d96a23353ce
julie-sullivan/phytomine,julie-sullivan/phytomine,julie-sullivan/phytomine,julie-sullivan/phytomine,julie-sullivan/phytomine,julie-sullivan/phytomine,julie-sullivan/phytomine