class_docstr: A click parameter that parses values into pd.Timedelta objects.
  
  Parameters
  ----------
  unit : {'D', 'h', 'm', 's', 'ms', 'us', 'ns'}, optional
      Denotes the unit of the input if the input is an integer.
code: def parser(self, value):
      return pd.Timedelta(value, unit=self.unit)
  
imports: from itertools import count
  import click
  import pandas
  from .context_tricks import CallbackManager
label_desc: Use image node_id 2 for calling the Timedelta obj's underlying member method code with example usage: obj.parser(value) and returns: pd