def retrieve_customer(customer_id, opts = {})
      data, _status_code, _headers = retrieve_customer_with_http_info(customer_id, opts)
      return data
    end
def retrieve_customer(customer_id, opts = {})
      data, _status_code, _headers = retrieve_customer_with_http_info(customer_id, opts)
      return data
    end
RetrieveCustomer
 Returns details for a single customer.
 @param customer_id The ID of the customer to retrieve.
 @param [Hash] opts the optional parameters
 @return [RetrieveCustomerResponse]