code: def _get_top(tight_bbox, axes_bbox):
      return tight_bbox.ymax - axes_bbox.ymax
  
file_path: catboost/contrib/python/matplotlib/py2/matplotlib/tight_layout.py
imports: import warnings
  import matplotlib
  from matplotlib.transforms import TransformedBbox, Bbox
  from matplotlib.font_manager import FontProperties
label_desc: Use image node_id 4 for calling a global function with example usage: _get_top(tight_bbox, axes_bbox) and returns: unknown