class_docstr: Tracks the performance of the algorithm.
code: def process_commission(self, commission):
      asset = commission["asset"]
      cost = commission["cost"]
  
      self.position_tracker.handle_commission(asset, cost)
      self.cumulative_performance.handle_commission(cost)
      self.todays_performance.handle_commission(cost)
  
imports: from __future__ import division
  import logbook
  import pandas
  from pandas.tseries.tools import normalize_date
  from catalyst.finance.performance.period import PerformancePeriod
  from catalyst.errors import NoFurtherDataError
  import catalyst.finance.risk
  from .position_tracker import PositionTracker
  from catalyst.constants import LOG_LEVEL
label_desc: Use image node_id 15 for calling the PerformanceTracker obj's underlying member method code with example usage: obj.process_commission(commission) without return types