class_docstr: Class for optimisation based on Genetic algorithms. 
class_docstr_tok: ["Class","for","optimisation","based","on","Genetic","algorithms","."]
docstr: Returns a string describing the method. 
docstr_tok: ["Returns","a","string","describing","the","method","."]
code: def _get_method_str(self):
      """Returns a string describing the method."""
      return "ga"
  
imports: from argparse import Namespace
  from numpy.random import choice
  from .blackbox_optimiser import BlackboxOptimiser, blackbox_opt_args
  from ..utils.general_utils import sample_according_to_exp_probs
  from ..utils.option_handler import get_option_specs, load_options
label_desc: Use image node_id 11 for calling the GAOptimiser obj's underlying member method code with example usage: obj._get_method_str() and returns: str