code: def register():
      """Register the unit conversion classes with matplotlib."""
      import matplotlib.units as mplU
  
      mplU.registry[str] = StrConverter()
      mplU.registry[Epoch] = EpochConverter()
      mplU.registry[Duration] = EpochConverter()
      mplU.registry[UnitDbl] = UnitDblConverter()
  
file_path: matplotlib/lib/matplotlib/testing/jpl_units/__init__.py
imports: from .Duration import Duration
  from .Epoch import Epoch
  from .UnitDbl import UnitDbl
  from .StrConverter import StrConverter
  from .EpochConverter import EpochConverter
  from .UnitDblConverter import UnitDblConverter
  from .UnitDblFormatter import UnitDblFormatter
label_desc: Use image node_id 1 for calling a global function with example usage: register() without return types