code: def getFieldNames(self):
      # It is expected for the first row to have the field names.
      return None
  
imports: import datetime
  import pytz
  import six
  from pyalgotrade.utils import dt
  from pyalgotrade.utils import csvutils
  from pyalgotrade.barfeed import membf
  from pyalgotrade import bar
label_desc: Use image node_id 4 for calling the GenericRowParser obj's underlying member method code with example usage: obj.getFieldNames() and returns: None