input: from typing import List
  
  def print_customer_data(name: str) -> None:
      """ Searches for customer data by customer name and prints the results.
      >>> print_customer_data("John Doe")
      Customer ID: 12345
      Name: John Doe
      Email: john.doe@example.com
      
      >>> print_customer_data("Jane Smith")
      Customer not found.
      """
output:     customer_data = {
          "John Doe": {
              "Customer ID": 12345,
              "Name": "John Doe",
              "Email": "john.doe@example.com"
          }
      }
      
      if name in customer_data:
          for key, value in customer_data[name].items():
              print(f"{key}: {value}")
      else:
          print("Customer not found.")