code: def convert_to(self, unit):
      if unit == self.unit or not unit:
          return self
      try:
          new_value = self.unit.convert_value_to(self.value, unit)
      except AttributeError:
          new_value = self
      return TaggedValue(new_value, unit)
  
imports: import math
  from packaging.version import parse
  import numpy
  import matplotlib.ticker
  import matplotlib.units
label_desc: Use image node_id 12 for calling the TaggedValue obj's underlying member method code with example usage: obj.convert_to(unit) and returns: TaggedValue, self