changed property name _data to _rawData to so that we could add a getter for it that wouldn't conflict with the existing method data. Added getters for _delimiter, _rowDelimiter, _rawData,  _header, _columnOffsets. Renamed _getOffsetIndex to getOffsetIndex and made public. Renamed _parseAsync to parseAsync and made public.
changed property name _data to _rawData to so that we could add a getter for it that wouldn't conflict with the existing method data. Added getters for _delimiter, _rowDelimiter, _rawData,  _header, _columnOffsets. Renamed _getOffsetIndex to getOffsetIndex and made public. Renamed _parseAsync to parseAsync and made public.

jupyter/jupyterlab,jupyter/jupyterlab,jupyter/jupyterlab,jupyter/jupyterlab,jupyter/jupyterlab