@property<EOL><INDENT>def customer_id(self):<DEDENT>
return self._customer_id<EOL>
Gets the customer_id of this OrderFulfillmentRecipient.
The Customer ID of the customer associated with the fulfillment.  If customer_id is provided, the corresponding recipient information fields (`display_name`, `email_address`, and `phone_number`) are automatically populated from the relevant customer profile. If the targeted profile information does not contain the necessary required information, the request will result in an error.

:return: The customer_id of this OrderFulfillmentRecipient.
:rtype: str