class_docstr: An HGSO class, inherited from Optimizer.
  
  This is the designed class to define HGSO-related
  variables and methods.
  
  References:
      F. Hashim et al. Henry gas solubility optimization: A novel physics-based algorithm.
      Future Generation Computer Systems (2019).
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code: def coefficient(self, coefficient: np.ndarray) -> None:
      if not isinstance(coefficient, np.ndarray):
          raise e.TypeError("`coefficient` should be a numpy array")
  
      self._coefficient = coefficient
  
imports: from typing import Any, Dict, Optional
  import numpy
  import opytimizer.math.general
  import opytimizer.math.random
  import opytimizer.utils.exception
  from opytimizer.core import Optimizer
  from opytimizer.core.agent import Agent
  from opytimizer.core.function import Function
  from opytimizer.core.space import Space
  from opytimizer.utils import logging
label_desc: Use image node_id 17 for calling the HGSO obj's underlying member method code with example usage: obj.coefficient(coefficient) without return types