class_docstr: Inspired/Taken from
      https://www.protechtraining.com/blog/post/879#simple-observer
class_docstr_tok: ["Inspired\/Taken","from","https",":","\/\/www.protechtraining.com\/blog\/post\/879","#","simple-observer"]
code: def get_subscribers(self, event):
      return self._events[event]
  
imports: import warnings
  from bayes_opt.constraint import ConstraintModel
  from .target_space import TargetSpace
  from .event import Events, DEFAULT_EVENTS
  from .logger import _get_default_logger
  from .util import UtilityFunction, acq_max, ensure_rng
  from sklearn.gaussian_process.kernels import Matern
  from sklearn.gaussian_process import GaussianProcessRegressor
label_desc: Use image node_id 2 for calling the Observable obj's underlying member method code with example usage: obj.get_subscribers(event) and returns: self