class_docstr: Calculates the age in years as a floating point number given a
     date of birth.
  
  Description:
      Age in years is computed by calculating the number of days between
      the date of birth and the reference time and dividing the result
      by 365.
  
  Examples:
      Determine the age of three people as of Jan 1, 2019
      >>> import pandas as pd
      >>> reference_date = pd.to_datetime("01-01-2019")
      >>> age = Age()
      >>> input_ages = [pd.to_datetime("01-01-2000"),
      ...               pd.to_datetime("05-30-1983"),
      ...               pd.to_datetime("10-17-1997")]
      >>> age(input_ages, time=reference_date).tolist()
      [19.013698630136986, 35.61643835616438, 21.221917808219178]
code: def get_function(self):
      def age(x, time=None):
          return (time - x).dt.days / 365
  
      return age
  
imports: from woodwork.column_schema import ColumnSchema
  from woodwork.logical_types import AgeFractional, Datetime
  from featuretools.primitives.base import TransformPrimitive
  from featuretools.utils.gen_utils import Library
label_desc: Use image node_id 1 for calling the Age obj's underlying member method code with example usage: obj.get_function() and returns: age, unknown