MassFlowIndexer# class MassFlowIndexer(phases=None, units=None, chemicals=None, **phase_data)# Create a MassFlowIndexer that can index a multi-phase, 2d-array given the phase and chemical IDs. Parameters: phases (tuple['s', 'l', 'g', 'S', 'L', 'G']) – Phases of data rows. units (str) – Units of measure of input data. chemicals (Chemicals) – Required to define the chemicals that are present. **phase_data (tuple[str, float]) – phase-(ID, value) pairs