code: def params():
      return {"objective": "binary", "verbose": -1, "num_leaves": 3}
  
imports: import numpy
  import pandas
  import pytest
  from sklearn.model_selection import train_test_split
  import lightgbm
  from lightgbm.compat import GRAPHVIZ_INSTALLED, MATPLOTLIB_INSTALLED, PANDAS_INSTALLED, pd_DataFrame
  from .utils import load_breast_cancer, make_synthetic_regression
label_desc: Use image node_id 4 for calling a global function with example usage: params() and returns: dict