class_docstr: Blackbox Optimiser Class. 
class_docstr_tok: ["Blackbox","Optimiser","Class","."]
docstr: Returns a string describing the progress in optimisation. 
docstr_tok: ["Returns","a","string","describing","the","progress","in","optimisation","."]
code: def _get_exd_child_report_results_str(self):
      """Returns a string describing the progress in optimisation."""
      best_val_str = "#Pareto: %d" % (len(self.curr_pareto_vals))
      opt_method_str = self._get_opt_method_report_results_str()
      return best_val_str + opt_method_str + ", "
  
imports: from __future__ import division
  from argparse import Namespace
  import numpy
  from ..exd.exd_core import ExperimentDesigner, exd_core_args
  from ..exd.experiment_caller import MultiFunctionCaller, FunctionCaller
  from ..exd.exd_utils import EVAL_ERROR_CODE
  from ..utils.general_utils import update_pareto_set
label_desc: Use image node_id 11 for calling the MultiObjectiveOptimiser obj's underlying member method code with example usage: obj._get_exd_child_report_results_str() and returns: unknown