code: def setVerifiedValue(self, row, field, value):
          
          if self._parameters[row]['parameter'] == 'filename':
              return # cannot be set this way?
          if field == 'parameter':
              self.setParamValue(row, parameter=value)
          elif field in ['start', 'stop', 'step']:
              if self.checkLimits(row, value):
                  kwd = {field : value}
                  self.setParamValue(row, **kwd)
docs: Sets the *value* for *field* in the parameter
          indexed by *row*, only if the value is within set limits
  
          :param row: the ith parameter number
          :type row: int
          :param field: detail of the parameter to set
          :type field: str
          :param value: pre-scaled value to assign to field