class_docstr: Provides Matplotlib conversion functionality for Monte Epoch and Duration
  classes.
code: def default_units(value, axis):
      # docstring inherited
      if cbook.is_scalar_or_string(value):
          return value.frame()
      else:
          return EpochConverter.default_units(value[0], axis)
  
file_path: catboost/contrib/python/matplotlib/py3/matplotlib/testing/jpl_units/EpochConverter.py
imports: from matplotlib import cbook, units
  import matplotlib.dates
label_desc: Use image node_id 6 for calling the EpochConverter obj's underlying member method code with example usage: obj.default_units(value, axis) and returns: value, EpochConverter