Add debug output for new getVisibleTextRangeOffsets implementation
Add debug output for new getVisibleTextRangeOffsets implementation

readium/readium-shared-js,NYPL/readium-shared-js,readium/readium-shared-js,NYPL/readium-shared-js,NYPL-Simplified/readium-shared-js,NYPL-Simplified/readium-shared-js