Un-break viewer digitization APIs. The cause was due to TypeScript's over-zealous cleaning up of unused declarations.
Un-break viewer digitization APIs. The cause was due to TypeScript's over-zealous cleaning up of unused declarations.

Fixes #1086

jumpinjackie/mapguide-react-layout,jumpinjackie/mapguide-react-layout,jumpinjackie/mapguide-react-layout,jumpinjackie/mapguide-react-layout,jumpinjackie/mapguide-react-layout