code: def computeColumnWidths(job_types, worker, job, options):
      
      cw = ColumnWidths()
      for t in job_types:
          updateColumnWidths(t, cw, options)
      updateColumnWidths(worker, cw, options)
      updateColumnWidths(job, cw, options)
      return cw
docs: Return a ColumnWidths() object with the correct max widths.